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Genes W, Y, Z assort independently and are dominant over their corresponding alleles w, y, z....

Genes W, Y, Z assort independently and are dominant over their corresponding alleles w, y, z. You conduct an experiment where you set up a cross between two individuals heterozygous for each trait [Ww Yy Zz x Ww Yy Zz].

(a) What is the frequency of offspring resulting from the cross who are dominant homozygous--that is, whose genotype is [WW YY ZZ]?(b) What is the frequency of offspring whose phenotype is dominant for all three traits?

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Answer #1

a) 1 (out of 64)

b) 27 (out of 64)

The ratio is 27:9:9:9:3:3:3:1

(Note: please refer the punnet square. I prepared it for the proper understanding of the answer. Thank you)

Trihybrid cross with punnet square possible arrangements WwYyZz GENOTYPES WYZ Wyz WYZ Wyz WYZ wyZ WYZ wyz WYZ WYz wyz WWYYZZ WwYyZz WWYyZz | wWyyZz WWYYzz WwYyzz WYZ WyZWYz Wyz WYZ wyZ WWYYZZ WWYyZZ WWYYZZI WWYyZz WWYYZZ WwYyZZ WWYYZZ WWyyzz WWYyZz wWyyZz WwYyzz WWyyzz WWYYZZ WWYyZZ WWYYzz WWYyzz WWYYZZ WwYyZz WWYyZz WWyyZz WWYyzz WWyyzz WwYyZz WwyyZz Wyz WYZ Wyz WwYyzz Wwyyzz WYZ WwYYZZ wwYyZz WWYYZZ WWYYZZ WWYYZZ wwYyZZ wwYYZZ wwYyZz wyz WwYyZZ Wwyyzz WwYyZzWwYyZz wwYyzz wwYyZz wwYyzZ wwyyZz WYz WwYYZz WwYyZz WwYYzz WwYyzz WWYYZz wwYyZz wwYYzz wwYyzz wyz WwYyZz WwyyZz WwYyzz Wwyyzz wwYyZz wwyyZz wwYyzz

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