As a result of crossing pigs with shaggy hair in f1, 15 with shaggy hair and 5 with smooth hair were obtained.

As a result of crossing pigs with shaggy hair in f1, 15 with shaggy hair and 5 with smooth hair were obtained. How many shaggy pigs will be homozygous and how many heterozygous.

In this problem, one can see a clear splitting of traits according to Mendel’s second law 15: 5 = 3: 1. This means that the crossed shaggy pigs were heterozygous.

Let A be a shaggy coat (there are more individuals with this phenotype in the offspring), then a is a smooth coat.

RR w Aa (m) x Aa (m)

m / f A a A AA (m) Aa (m) a Aa (m) aa (d)
By genotype:

25% are homozygotes for the dominant prizak;

25% are homozygotes for a recessive trait;

50% are heterozygotes.

Answer: phenotype 3: 1 cleavage, 1: 2: 1 genotype cleavage.