Based on this information, what is Dolly's genotype for the myotonia congenita gene?

 - having myotonia congenita
 - Mm
An organism's genotype for a gene is its combination of alleles for that gene. Dolly has one allele for having myotonia congenita (M) and one allele for not having myotonia congenita (m). So, Dolly's genotype for the myotonia congenita gene is Mm.