In silkworms a single gene determines the color of the color of the cacoon. The yellow cocoon allele is dominant. It is indicated by “C”. The white allele is recessive, and indicated by “c”. Use a punnet square to cross a homozygous dominant male (CC) with a homozygous recessive female.

Question

In silkworms a single gene determines the color of the color of the cacoon. The yellow cocoon allele is dominant. It is indicated by “C”. The white allele is recessive, and indicated by “c”. Use a punnet square to cross a homozygous dominant male (CC) with a homozygous recessive female.

Answer 1

Here is a Punnett square for crossing a homozygous dominant male (CC) with a homozygous recessive female (cc):

```
C C
c Cc Cc
c Cc Cc
```

In this Punnett square, all offspring will have the heterozygous genotype (Cc), meaning they will have a yellow cocoon color.