Question

White feathers in canaries are dominant to yellow feathers. a heterozygous canary is crossed with a homozygous recessive canary. what ratio of the offspring will be homozygous recessive? : what percent of the offspring will be heterozygous? %

Answer 1

2/4
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50%



         

Answer 2

The representation of the genotypes is as follows:

Homozygous recessive canary: yy

Heterozygous dominant canary: Wy

The white and yellow feathers are the phenotypes and yy or Wy is the genotype of parental alleles.

In F1 generation, the type of feather the canary offspring will have can be predicted by punnet squares shown in image.

Offspring that are homozygous recessive (yy): 2 out of 4 or 2/4=1/2 or 50%

Offspring that are heterozygous (Wy): 2 out of 4 or 2/4=1/2 or 50%