The Dihybrid Cross

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Gregor Mendel performed crosses in which he followed the segregation of two genes. These experiments formed the basis of his discovery of his second law, the law of independent assortment.

A Dihybrid cross is a cross between two parents that differ by two pairs of alleles (AABB x aabb)

The dominance relationship between alleles for each trait was already known to Mendel when he made this cross. The purpose of the dihybrid cross was to determine if any relationship existed between different allelic pairs.




Let's now look at the cross using our gene symbols.






In Mendel's experiments, a monohybrid cross produces 4 different possible combinations in the F2 Generation.This results to a phenotypic ratio of 3:1.

1.) What about a dihybrid cross, how many combinations are possible in the F2 Generation?

2.) What is the ratio of the resulting phenotypes in the F2 Generation?

Write your answers in the comments.

Labels: , ,

113 comments:

  1. Blue VicuñaDecember 14, 2017 at 8:29 PM

    Crossing AaBb x AaBb, we would get:
    AABB, AAbB, aABB, aAbB, AABb, AAbb, aABb, aAbb, AaBB, AabB, aaBB, aabB, AaBb, Aabb, aaBb, and aabb.

    Thus:
    1.) There are 16 combinations possible.
    2.) 9(both traits dominant):3(first trait dominant):3(second trait dominant):1(both traits recessive)

    ReplyDelete
  2. Paolo TolentinoDecember 15, 2017 at 12:05 AM

    1. 4 combinations
    2. 9:3:3:1

    ReplyDelete
  3. UnknownDecember 18, 2017 at 1:38 PM

    1. the possible combination in the F2 generation of dihybrid cross is 16.
    2. the ratio of the resulting phenotypes in the F2 Generation is 9:3:3:1.

    ReplyDelete
  4. TayongDecember 18, 2017 at 2:44 PM

    Answers:
    1. The possible no. of combinations in the F2 Generations is 9. These are GGWW, GGWw, GGww, GgWW, GgWw, Ggww, ggWW, ggWw and ggww.
    2. The ratio of the resulting phenotypes in the F2 Generation is 2:7 (homozygous:heterozygous)

    ReplyDelete
  5. Jhon Fhel DuranDecember 21, 2017 at 12:00 PM

    Answer
    1). 16 combinations
    2). The ratio is 9:3:3:1

    ReplyDelete
  6. UnknownDecember 21, 2017 at 12:24 PM

    Ken kanashiro
    1.) 7 F2 generation combinations
    2.) 2:1:1:1:1:1:1

    ReplyDelete
  7. UnknownDecember 21, 2017 at 6:04 PM

    1. In a dihybrid cross, the two parents differ by two pairs of alleles so therefore the possible combinations in the F2 generation is 16.

    2. The ratio of the resulting phenotypes in the F2 generation is 16:1

    ReplyDelete
  8. StreamlightDecember 21, 2017 at 8:51 PM

    1.) 16 combinations
    2.) 9:3:3:1

    ReplyDelete
  9. UnknownDecember 22, 2017 at 2:16 PM

    1. 6
    2. 4:0

    ReplyDelete
  10. UnknownDecember 22, 2017 at 2:26 PM

    1. 13 combinations
    2. Phenotypic ratio: 9:3:3:1

    ReplyDelete
  11. UnknownDecember 22, 2017 at 2:28 PM

    1) 6
    2) 4:0

    maricar r. lopena
    shechem

    ReplyDelete
  12. BatinoDecember 23, 2017 at 11:22 AM

    1.) What about a dihybrid cross, how many combinations are possible in the F2 Generation?

    Answer: There are 9 possible combinations: GGWw, GgWW, GgWw, Ggww, ggWw, GGWW, GGww, ggWW, ggww

    2.) What is the ratio of the resulting phenotypes in the F2 Generation?

    Answer: The phenotypic ratio is 9:3:3:1

    ReplyDelete
  13. Fangirl18December 23, 2017 at 4:35 PM

    1.) There are 16 possible combinations in dihybrid cross F2 generation.
    2.) This results to a phenotypic ratio of 9:3:3:1.
    (-Mariejay Cunanan)

    ReplyDelete
  14. Daniella LCDecember 26, 2017 at 12:49 AM

    1.) 16 combinations are possible in the F2 Generation.
    2.) GGWW(1):GGWw(2):GgWW(2):GgWw(4):GGww(1):Ggww(2):ggWW(1):ggWw(2):ggww(1)

    ReplyDelete
  15. Daniella LCDecember 26, 2017 at 12:53 AM

    1.)16 combinations are possible in the F2 Generation.
    2.) GGWW(1):GGWw(2):GgWW(2):GgWw(4):GGww(1):Ggww(2):ggWW(1):ggWw(2):ggww(1)

    ReplyDelete
  16. Daniella LCDecember 26, 2017 at 12:57 AM

    1.) 16 combinations are possible in the F2 Generation.
    2.) GGWW(1):GGWw(2):GgWW(2):GgWw(4):GGww(1):Ggww(2):ggWW(1):ggWw(2):ggww(1)

    ReplyDelete
  17. Daniella LCDecember 26, 2017 at 12:57 AM

    1.) 16 combinations are possible in the F2 Generation.
    2.) GGWW(1):GGWw(2):GgWW(2):GgWw(4):GGww(1):Ggww(2):ggWW(1):ggWw(2):ggww(1)

    ReplyDelete
  18. Daniella LCDecember 26, 2017 at 12:58 AM

    1.) 16 combinations are possible in the F2 Generation.
    2.) GGWW(1):GGWw(2):GgWW(2):GgWw(4):GGww(1):Ggww(2):ggWW(1):ggWw(2):ggww(1)

    ReplyDelete
  19. Daniella LCDecember 26, 2017 at 12:58 AM

    1.) 16 combinations are possible in the F2 Generation.
    2.) GGWW(1):GGWw(2):GgWW(2):GgWw(4):GGww(1):Ggww(2):ggWW(1):ggWw(2):ggww(1)

    ReplyDelete
  20. AnonymousDecember 26, 2017 at 8:15 PM

    Lenie Anne L. Perez

    1. In a dihybrid cross, there are 16 possible combinations in the F2 Generation.

    2. The resulting phenotype ratio of F2 Generation is 9:3:3:1

    ReplyDelete
  21. UnknownDecember 26, 2017 at 8:41 PM

    Lenie Anne L. Perez

    1. In a dihybrid cross, there are 16 possible combinations in the F2 Generation.

    2. The ratio of the resulting phenotypes is 9:3:3:1

    ReplyDelete
  22. UnknownDecember 26, 2017 at 9:34 PM

    1. 4
    2. 9:3:3:1 ratio
    Jaf Fallloria- Salem

    ReplyDelete
  23. AnonymousDecember 27, 2017 at 5:34 PM

    Jackielou Bohol
    12-Sinai
    1. 16
    2. 9:3:3:1

    ReplyDelete
  24. AnonymousDecember 27, 2017 at 5:35 PM

    Kyle Russel Santos
    12-Sinai
    1. 16
    2. 9:3:3:1

    ReplyDelete
  25. Lizette S. Doroteo XII-SHUNEMDecember 28, 2017 at 2:16 PM

    1. F2 Generation: 16 combinations
    2. phenotypes: 9:3:3:1
    G/W: 9
    G/r: 3
    r/G: 3
    g/w: 1

    LIZETTE S. DOROTEO XII-SHUNEM

    ReplyDelete
  26. Ronald Christian Andal (STEM-Salem)December 28, 2017 at 3:08 PM

    1.) There are 16 possible combinations in the F2 generation.
    2.) The phenotypic ratio of the F2 generation is 9:3:3:1

    ReplyDelete
  27. UnknownDecember 28, 2017 at 3:18 PM

    1. There are four possible combinations.
    2. The F1 was self-crossed to give rise to the F2 generation.

    ReplyDelete
  28. UnknownDecember 28, 2017 at 3:33 PM

    1.) 7combination in the f2 generation
    2.)1(GG):1(GW):1(Gw):2(Ww):1(gg):1(Wg):1(gw)

    ReplyDelete
  29. Albert BalagatDecember 29, 2017 at 3:36 PM

    1. 4
    2. GW(1) : Gw(1) : gW(1) : gw(1)

    ReplyDelete
  30. Ian Geoffrey V. LopezDecember 29, 2017 at 3:37 PM

    1. 4
    2. GW(1):Gw(1):gW(1):gw(1)

    ReplyDelete
  31. UnknownDecember 29, 2017 at 6:51 PM

    1.4
    2.GW(1):Gw(1):gW(1):gw(1)

    ReplyDelete
  32. AnonymousDecember 30, 2017 at 11:54 AM

    Angelica Magpantay STEM Smyrna.

    1. In the monohybrid cross the possible number of combination is 4. While in the dihybrid cross is 16.

    2. The ratio in monohybrid cross is 3:1 and in dihybrid cross is 9:3:3:1.

    ReplyDelete
  33. AnonymousDecember 30, 2017 at 11:54 AM

    Angelica Magpantay STEM Smyrna.

    1. In the monohybrid cross the possible number of combination is 4. While in the dihybrid cross is 16.

    2. The ratio in monohybrid cross is 3:1 and in dihybrid cross is 9:3:3:1.

    ReplyDelete
  34. UnknownDecember 30, 2017 at 12:06 PM

    Angelica Magpantay STEM Smyrna.

    1. In the monohybrid cross the possible number of combination is 4. While in the dihybrid cross is 16.

    2. The ratio in monohybrid cross is 3:1 and in dihybrid cross is 9:3:3:1.

    ReplyDelete
  35. UnknownDecember 30, 2017 at 12:06 PM

    Angelica Magpantay STEM Smyrna.

    1. In the monohybrid cross the possible number of combination is 4. While in the dihybrid cross is 16.

    2. The ratio in monohybrid cross is 3:1 and in dihybrid cross is 9:3:3:1.

    ReplyDelete
  36. UnknownDecember 30, 2017 at 3:49 PM

    1) 4
    2) GW (1) : Gw (1) : gW (1) : gw (1)

    ReplyDelete
  37. AnonymousDecember 30, 2017 at 4:47 PM

    1.) What about a dihybrid cross, how many combinations are possible in the F2 Generation?
    - There are about 16 possible combinations for the F2 generation when dihybrid cross is used.

    2.) What is the ratio of the resulting phenotypes in the F2 Generation?
    - The Phenotypic ratio would be 9 (Dominant both G & W) :3 (Dominant G & Recessive w) :3 (Recessive g & Dominant W) :1 (Recessive both g & w)

    -Mark Hachero

    ReplyDelete
  38. AnonymousDecember 30, 2017 at 9:50 PM

    Renzsky Enriquez STEM-SHECHEM

    1.) There are 9 possible combinations in F2 generation of a dihybrid cross.

    2.) The ratio of resulting phenotype in the F2 generation is 9:3:3:1

    ReplyDelete
  39. Flix Mowry CambaheDecember 30, 2017 at 10:42 PM

    1. 16 combinations
    2. 16:16 or 1

    ReplyDelete
  40. UnknownDecember 31, 2017 at 5:38 PM

    Miguel Lugay - Smyrna
    1) 4 possible combination
    2) 2:2

    ReplyDelete
  41. Gwen Camille Pico (SHUNEM)January 1, 2018 at 2:25 AM

    1.) 16 Combinations
    2.) 9:3:3:1

    ReplyDelete
  42. UnknownJanuary 1, 2018 at 3:10 AM

    Lawrence B. Mingote Stem 12-Shunem
    1. 16 combinations
    2. 9:3:3:1

    ReplyDelete
  43. UnknownJanuary 1, 2018 at 8:56 AM

    Frederick John A. Lubaton
    Answers:
    1.) 16 combinations
    2.) Ratio is 9:3:3:1

    ReplyDelete
  44. Leonica TorresJanuary 1, 2018 at 8:58 AM

    1) 16 combinations
    2) Phenotypic ratio: 9:3:3:1

    ReplyDelete
  45. Charlene aurellanaJanuary 1, 2018 at 9:47 AM

    1. 16 combinations
    2. 15:1

    ReplyDelete
  46. John Poll R. RioverosJanuary 1, 2018 at 9:55 AM

    1 In F2 generation, there are 11 possible combinations.
    2 This results to a phenotypic ratio of 8:3

    ReplyDelete
  47. UnknownJanuary 1, 2018 at 2:12 PM

    Via Cris D. Echavez
    STEM12-SHECHEM

    1. There are 9 possible combinations in the F2 Generation in dihybrid cross.

    2. The phenotypic ratio is 9:3:3:1

    ReplyDelete
  48. UnknownJanuary 1, 2018 at 2:43 PM

    1. 9 possible combination.
    2. 9:3:3:1
    CHRISTEL CARINO

    ReplyDelete
  49. UnknownJanuary 1, 2018 at 2:44 PM

    1. 9 Possible combinations
    2. 9:3:3:1

    ReplyDelete
  50. UnknownJanuary 1, 2018 at 2:44 PM

    1. 9 possible combinations
    2.9:3:3:1

    ReplyDelete
  51. Jhon Paull VerdidaJanuary 1, 2018 at 5:22 PM

    Answers by: Jhon Paull Verdida XII-SAMARIA

    1.) There are 16 possible combinations in the F2 Generation.

    2.) The ratio of the resulting phenotypes in the F2 Generation is ratio of 9:3:3:1, where:

    the 9 represents the proportion of individuals displaying both dominant traits
    the first 3 represents the individuals displaying the first dominant trait and the second recessive trait
    the second 3 represents those displaying the first recessive trait and second dominant trait
    the 1 represents the homozygous, displaying both recessive traits.

    ReplyDelete
  52. Ivan Jeremy V. AbilaJanuary 1, 2018 at 6:47 PM

    1.) 16
    2.) 9:3:3:1

    ReplyDelete
  53. UnknownJanuary 1, 2018 at 7:23 PM

    1. 16 combinations
    2. 9:3:3:1

    ReplyDelete
  54. Jenny Vheyb BalalilhiJanuary 1, 2018 at 7:57 PM

    1. 16 combinations
    2.9:3:3:1

    ReplyDelete
  55. UnknownJanuary 1, 2018 at 9:30 PM

    1. 16
    2. 9:3:3:1

    ReplyDelete
  56. UnknownJanuary 1, 2018 at 9:31 PM

    1. 16
    2. 9:3:3:1

    ReplyDelete
  57. UnknownJanuary 1, 2018 at 9:33 PM

    1. 16
    2. 9:3:3:1

    ReplyDelete
  58. UnknownJanuary 1, 2018 at 9:34 PM

    1. 16 combinations
    2. 9:3:3:1

    ReplyDelete
  59. BatinoJanuary 1, 2018 at 10:46 PM

    1.) What about a dihybrid cross, how many combinations are possible in the F2 Generation?

    Answer: 16 possible combinations

    2.) What is the ratio of the resulting phenotypes in the F2 Generation?

    Answer: The phenotypic ratio is 9:3:3:1

    ReplyDelete
  60. UnknownJanuary 1, 2018 at 10:54 PM

    1) 16 possible combinations
    2) 9:3:3:1

    ReplyDelete
  61. Joan Kaye PeregrinoJanuary 1, 2018 at 11:20 PM

    1. the dihybrid cross produces 16 different possible combination in f2 Generation.
    2. the ratio of the resulting phenotyes in the F2 Generation is 9:3:3:1

    ReplyDelete
  62. Joan Kaye PeregrinoJanuary 1, 2018 at 11:24 PM

    1. The dihybrid cross produces 16 different possible combination in F2 Generation.
    2. The ratio of the resulting phenotypes in the F2 Generation is 9:3:3:1

    ReplyDelete
  63. Miguel Angelo TomimbangJanuary 1, 2018 at 11:49 PM

    Answers
    1. 16 possible combinations
    2. Tall:9 Dwarf:7

    ReplyDelete
  64. Miguel Angelo TomimbangJanuary 1, 2018 at 11:50 PM

    Answers
    1. 16 possible combinations
    2. Tall:9 Dwarf:7

    ReplyDelete
  65. Marwin T. MaligayaJanuary 2, 2018 at 12:15 AM

    1. 9 Possible Combination
    2. 9:3:3:1

    ReplyDelete
  66. Fritche MelloriaJanuary 2, 2018 at 11:24 AM

    1) 9 possible combination.
    2) 9:3:3:1

    ReplyDelete
  67. AnonymousJanuary 2, 2018 at 11:32 AM

    1. 9 possible combination
    2. 9:3:3:1 phenotypic ratio

    ReplyDelete
  68. UnknownJanuary 2, 2018 at 1:07 PM

    1: 16
    2: 9:3:3:1

    ReplyDelete
  69. Jeremy MoldezJanuary 2, 2018 at 1:19 PM

    1.16
    2.9:3:3:1

    ReplyDelete
  70. Jerome S. SantiagoJanuary 2, 2018 at 1:20 PM

    1) 9 possible combination.
    2) 9:3:3:1

    ReplyDelete
  71. Palero, Liezel O.January 2, 2018 at 1:22 PM

    1. 16 combinations
    2. 9:3:3:1

    ReplyDelete
  72. Jerome S. SantiagoJanuary 2, 2018 at 1:22 PM

    A. xx
    B. Xx:Xx
    C. No

    ReplyDelete
  73. Elyzel FloresJanuary 2, 2018 at 1:44 PM

    1.) What about a dihybrid cross, how many combinations are possible in the F2 Generation?
    -In a dihybrid cross, 16 combinations are possible in the F2
    generation

    2.) What is the ratio of the resulting phenotypes in the F2 Generation?
    -the ratio of the resulting phenotypes in the F2 generation would be
    9(Dominant both G & W) :3 (Dominant G & Recessive w) :3 (Recessive g &
    Dominant W) :1 (Recessive both g & w)

    The last Emperor of Russia, Nicolas II, was married to Empress Alexandra, and they had five children, Olga, Tatiana, Maria, Anastasia, and Alexis. Alexis was the only one who was afflicted with hemophilia or the royal bleeding disease; all other members were normal.

    If only Prince Alexis was afflicted with the disease,

    a.) determine his genotype.
    -Xh Y

    b.) What could be the genotypes of the Emperor and Empress?
    -Emperor – XH Y
    -Emperess – XH Yh

    c.) Is it possible that each daughter could have been a carrier?
    -since Hemophilia is a sex linked recessive trait, boys will be the one to inherit the trait because they only have one X chromosome

    ReplyDelete
  74. UnknownJanuary 2, 2018 at 2:45 PM

    1.)It will produce 16
    combinations
    2.)The ratio will be 9:3:3:1

    ReplyDelete
  75. Irish Nadine EsmoresJanuary 2, 2018 at 2:53 PM

    1) In the dihybrid cross, there could be 16 different possible combinations in the f2 generation
    2) The ratio of the resulting phenotypes in f2 generation is 9:3:3:1

    ReplyDelete
  76. Joed Louise LinaJanuary 2, 2018 at 3:37 PM

    1. 16 combinations
    2. 9:3:3:1

    ReplyDelete
  77. MailynJanuary 2, 2018 at 3:48 PM

    1. There are 16 possible combinations is your cross a dyhybrid.


    2. 9:3:3:1

    ReplyDelete
  78. Mariel Allen Flores -SalemJanuary 2, 2018 at 5:01 PM

    1. 16 combinations
    2. 9:3:3:1

    ReplyDelete
  79. Ryan Milleza SalemJanuary 2, 2018 at 5:07 PM

    1)16 combinations
    2)9:3:3:1

    ReplyDelete
  80. UnknownJanuary 2, 2018 at 5:28 PM

    1.) There are 16 Combinations
    2.) The ratio of the resulting phenotypes in the F2 Generation is 9:3:3:1

    ReplyDelete
  81. UnknownJanuary 2, 2018 at 5:31 PM

    1.16 2. 9:3 3:1 -Aife Joy Annedhie Armas

    ReplyDelete
  82. CALOSA,MA.PRINCESA A.January 2, 2018 at 6:09 PM

    1. The possible combinations in the f2 generation is 4.
    2. one homozygous dominant, one homozygous recessive. I think its 3:1

    ReplyDelete
  83. AnonymousJanuary 2, 2018 at 6:18 PM

    1.) There are four (4) possible combinations in a dihybrid cross of its F2 generation.
    2.) 9:3:3:1 is the phenotypic ratio of its F2 generation.

    John Rafael C. Añon
    Grade 12- Samaria

    ReplyDelete
  84. UnknownJanuary 2, 2018 at 6:49 PM

    1. 16 combinations
    2. 9:3:3:1
    Maria Sophia S. Mojica

    ReplyDelete
  85. UnknownJanuary 2, 2018 at 6:49 PM

    1. 16 combinations
    2. 9:3:3:1
    Maria Sophia Mojica

    ReplyDelete
  86. UnknownJanuary 2, 2018 at 6:51 PM

    1.16 2. 9:3 3:1 -Mark Deniel Esporlas

    ReplyDelete
  87. Raphael Delos SantosJanuary 2, 2018 at 6:58 PM

    1.) 8 different possible combinations
    2.) 7:1

    ReplyDelete
  88. UnknownJanuary 2, 2018 at 7:10 PM

    1. 4 combinations
    2. 9:3:3:1

    ReplyDelete
  89. Zyan Maverick John GutierrezJanuary 2, 2018 at 7:17 PM

    1, 16
    2, 9:3:3:1

    ReplyDelete
  90. UnknownJanuary 2, 2018 at 7:24 PM

    1. 1 combination = Tt ( tall )
    2. (Tall) Tt ( 4 ) : ( Dwarf ) tt ( 0 ) .

    ReplyDelete
  91. UnknownJanuary 2, 2018 at 7:25 PM

    1. 16
    2. 9:3:3:1
    Jozel Jamilla
    Shechem

    ReplyDelete
  92. UnknownJanuary 2, 2018 at 7:33 PM

    1. 16
    2. 4:0
    maricar r. Lopena
    shechem

    ReplyDelete
  93. Jennidean Kate TanghalJanuary 2, 2018 at 7:34 PM

    Answer:
    1.) 16 combinations are possible
    2.) 4:16

    ReplyDelete
  94. UnknownJanuary 2, 2018 at 7:44 PM

    1) 16
    2) 9:3 3:1
    eleuterio jay rivera
    shechem

    ReplyDelete
  95. AnonymousJanuary 2, 2018 at 7:48 PM

    1. 16 Combinations
    2. 9:3:3:1
    Angelo Leon M. Aurelio

    ReplyDelete
  96. Aaron John II M LuzonJanuary 2, 2018 at 9:14 PM

    i think the possible amount can give of dihybrid cross is quadrupled from a mono hybrid cross mean if the mono hybrid cross can give 4 combination then the di hybrid cross can give a 16 combination. and it will have tha ratio oh 8 : 8 or 16 : 0 and 15 :1.

    ReplyDelete
  97. UnknownJanuary 2, 2018 at 10:18 PM

    1. There are four possible combinations of gametes for the AaBb parent.

    2. if we start with true-breeding parents (one homozygous dominant, one homozygous recessive), all of the F1 progeny will be heterozygous and show the dominant phenotype, and then these will give rise to a ratio of phenotypes in the F2 generation in a monohybrid cross

    ReplyDelete
  98. UnknownJanuary 2, 2018 at 10:20 PM

    1. There are four possible combinations of gametes for the AaBb parent.

    2. When two true breeding parents are crossed, the recessive trait is hidden in the offspring, only to reveal itself later in the grandchildren. The classic ratio for a monohybrid cross with straight dominance is Dominant to recessive in the F2.

    ReplyDelete
  99. UnknownJanuary 2, 2018 at 10:47 PM

    1. 4
    2. 3:1

    ReplyDelete
  100. UnknownJanuary 2, 2018 at 10:51 PM

    1. 16 combinations
    2. 9:3:3:1

    Kyle Erjo Dela Cruz
    STEM-Samaria

    ReplyDelete
  101. UnknownJanuary 3, 2018 at 12:04 AM

    1.) 16 combinations are possible in the F2 Generation

    2.) 9:3:3:1 combination

    ReplyDelete
  102. Kenneth N. AtencioJanuary 3, 2018 at 12:38 AM

    1.) 16 combinations
    2.) 9:3:3:1

    Kenneth N. Atencio
    Shechem

    ReplyDelete
  103. Refuerzo David STEM SMYRNAJanuary 3, 2018 at 6:24 AM

    I wanted to answer this previously but didn't know how, but I will keep to my answer:
    1. 6 possible combinations: GGWW, GGww, ggww, ggWW,GgWw, GGWw, GgWW
    2. Phenotypic Ratio: 3(both alleles dominant):1(Second Allele Dominant):1(First Allele Dominant):1(Both Alleles Recessive)

    ReplyDelete
  104. Cris Jester H. DavidJanuary 3, 2018 at 9:44 AM

    1. 16 possible combinations in F2 generation.
    2. The ratio of the resulting phenotypes in F2 Generation is 9:3:3:1.

    ReplyDelete
  105. UnknownJanuary 3, 2018 at 11:52 AM

    1. There are 16 possible combinations8
    2. The ratio is 9:3:3:1

    Jasmin Shane Napoles

    ReplyDelete
  106. UnknownJanuary 3, 2018 at 11:52 AM

    1. There are 16 possible combinations8
    2. The ratio is 9:3:3:1

    Jasmin Shane Napoles

    ReplyDelete
  107. AnonymousJanuary 4, 2018 at 9:18 AM

    Zapanta, Shan Kyle M. (SHECHEM)
    1.) There are 16 possible combinations in the F2 generation.
    2.) The ratio would be 9:3:3:1

    ReplyDelete
  108. AnonymousJanuary 5, 2018 at 10:29 AM

    1.) 16 Possible combination in the F2 Generation
    2.) The Ratio is 9:3:3:1

    Ralfh Villena
    Stem-salem

    ReplyDelete
  109. Cherlom miloJanuary 5, 2018 at 10:48 AM

    1. 16 combinations
    2. 9:3:3:1
    Cherlom Louie P. Milo
    12-Salem

    ReplyDelete
  110. UnknownJanuary 7, 2018 at 2:26 PM

    John Vincent Lunar
    1. 16 possibilities
    2. 9:3:3:1
    STEM-Salem

    ReplyDelete
  111. Kate Irish V. AmodiaJanuary 26, 2018 at 7:36 AM

    1.) What about a dihybrid cross, how many combinations are possible in the F2 Generation?
    -In a dihybrid cross, 16 combinations are possible in the F2
    generation

    2.) What is the ratio of the resulting phenotypes in the F2 Generation?
    -the ratio of the resulting phenotypes in the F2 generation would be
    9(Dominant both G & W) :3 (Dominant G & Recessive w) :3 (Recessive g &
    Dominant W) :1 (Recessive both g & w)

    The last Emperor of Russia, Nicolas II, was married to Empress Alexandra, and they had five children, Olga, Tatiana, Maria, Anastasia, and Alexis. Alexis was the only one who was afflicted with hemophilia or the royal bleeding disease; all other members were normal.

    If only Prince Alexis was afflicted with the disease,

    a.) determine his genotype.
    -Xh Y

    b.) What could be the genotypes of the Emperor and Empress?
    -Emperor – XH Y
    -Emperess – XH Yh

    c.) Is it possible that each daughter could have been a carrier?
    -since Hemophilia is a sex linked recessive trait, boys will be the one to inherit the trait because they only have one X chromosome

    ReplyDelete
  112. Kate Irish V. AmodiaJanuary 26, 2018 at 7:44 AM

    1. There are 16 possible combinations8
    2. The ratio is 9:3:3:1

    ReplyDelete
  113. Kate Irish V. AmodiaJanuary 26, 2018 at 7:44 AM

    1. 16 possible combinations in F2 generation.
    2. The ratio of the resulting phenotypes in F2 Generation is 9:3:3:1.

    ReplyDelete

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