Question

myotonia congenita is a condition that causes temporary muscle stiffness.
when goats with myotonia congenita attempt to run from a resting position, their
leg muscles often stiffen, causing them to fall over. because of this behavior,
these goats are referred to as fainting goats. myotonia congenita is 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 m is for having
myotonia congenita, and the allele m is for not having myotonia congenita.
toniel, a goat from this group, has myotonia congenita. toniel has two alleles for having
myotonia congenita.
based on this information, click the blue words to correct any errors in the text.
toniel is heterozygous for the myotonia congenita gene.
toniels phenotype for the myotonia congenita gene is mm.
toniel has myotonia congenita. this is toniels genotype for the myotonia congenita
trait.
submit

Explanation:

• Tonel's phenotype: Since Tonel has myotonia congenita and the allele \(M\) is for having myotonia congenita, and the allele \(m\) is for not having it. If Tonel has the trait, and assuming the trait is dominant (as per common genetic problem - setups in such questions, though not explicitly stated but inferred from the need to correct the text where it wrongly said Tonel's gene is \(MM\) and was heterozygous). If the trait is dominant, and Tonel has the trait with two alleles (heterozygous \(Mm\)), then the phenotype is having myotonia congenita.
• Tonel's genotype: The text wrongly said Tonel's gene is \(MM\) (homozygous). But it was stated that Tonel is heterozygous. Heterozygous means having two different alleles. Since \(M\) is for the trait (myotonia congenita) and \(m\) is for not having it, and Tonel has the trait (so \(M\) is dominant), the correct genotype is \(Mm\).
• Tonel's phenotype for the gene: As \(M\) (assuming dominant) leads to the phenotype of having myotonia congenita.

Answer:

• Tonel's phenotype for the myotonia congenita gene: Has myotonia congenita.
• Tonel's genotype for the myotonia congenita gene: \(Mm\).