Question

also found in other mammals, including horses, cats, and humans.

in a group of goats, some individuals have myotonia congenita and others do not. in this group, the gene for the myotonia congenita trait has two alleles. the allele for not having myotonia congenita (m) is recessive to the allele for having myotonia congenita (m).

this punnett square shows a cross between two goats.

what is the expected ratio of homozygous recessive to homozygous dominant to heterozygous offspring genotypes?

Explanation:

Step1: Count the genotypes

From the Punnett square, there are 2 \(MM\) (homozygous dominant), 2 \(Mm\) (heterozygous), and 0 \(mm\) (homozygous recessive) genotypes.

Answer:

\(0:2:2\)