In F1, only short-nosed individuals were obtained from crossing long-nosed and short-nosed

In F1, only short-nosed individuals were obtained from crossing long-nosed and short-nosed anteaters. identify the dominant gene and F2.

Since all F1 offspring demonstrate the trait of only one of the parental individuals, it should be concluded that the gene for this trait is dominant and the parental anteaters are homozygous.

Let’s designate the gene that causes the development of a short nose in the anteater as B, then the gene for the long nose of this animal will be b.

Parent anteaters with a long nose – bb, produced germ cells – b.

Parent anteaters with a short nose – BB, produced germ cells – B.

All F1 turned out to be heterozygous anteaters with short noses and genotype Bb. They, in turn, will produce two types of germ cells – b and B.

The offspring of such hybrid F2 anteaters will be represented by the following options:

homozygote pups with short noses (BB) – 25%;

heterozygote pups with short noses (Bb) – 50%;

cubs homozygote with long noses (bb) – 25%.