solve this question by using punnet square In cats, the gene for fur colour has two alleles. The dominant allele (A) codes for black fur while the recessive allele (a) codes for orange fur. The female cat is heterozygous and the male is homozygous recessive. What would the possible genotypes and phenotypes of their kittens be?
Question
solve this question by using punnet square In cats, the gene for fur colour has two alleles. The dominant allele (A) codes for black fur while the recessive allele (a) codes for orange fur. The female cat is heterozygous and the male is homozygous recessive. What would the possible genotypes and phenotypes of their kittens be?
Solution
Sure, let's solve this using a Punnett square.
First, let's identify the genotypes of the parents. The female cat is heterozygous, which means she has one dominant allele (A) and one recessive allele (a). So her genotype is Aa. The male cat is homozygous recessive, which means he has two recessive alleles (a). So his genotype is aa.
Now, let's set up the Punnett square. The Punnett square is a 2x2 grid. We write the alleles of one parent along the top of the grid and the alleles of the other parent along the side of the grid.
Here's what the Punnett square looks like for this cross:
a a
-------------
A | Aa Aa ------------- a | aa aa
Now, let's interpret the results. The Punnett square shows us all possible combinations of alleles that the kittens could inherit from their parents.
The genotypes of the kittens could be Aa (heterozygous) or aa (homozygous recessive).
The phenotypes (physical appearances) of the kittens would correspond to these genotypes. Kittens with the Aa genotype would have black fur because the dominant allele (A) codes for black fur. Kittens with the aa genotype would have orange fur because they have two recessive alleles, and the recessive allele codes for orange fur.
So, the possible genotypes of the kittens are Aa and aa, and the possible phenotypes are black fur and orange fur.
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