Question

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 m is for having myotonia congenita, and the allele m is for not having myotonia congenita.
hera is a goat from this group. heras phenotype for the myotonia congenita trait is not having myotonia congenita. heras genotype for the myotonia congenita gene is mm.
based on this information, complete the following statement.
hera is __________ for the myotonia congenita gene.
heterozygous
homozygous

Explanation:

An organism is homozygous for a gene when it has two identical alleles for that gene. Hera's genotype is $mm$, meaning she has two copies of the same recessive allele.

Answer:

homozygous