Question

Predict the results from the following crosses: Rr x rr.

A) 50% Rr: 50% rr
B) 75% Rr: 25% rr
C) 100% Rr

Answer 1

Answer;

A) 50% Rr: 50% rr

Explanation;

The cross Rr x rr, represent a cross between a heterozygous genotype and a recessive genotype.

The offspring of the cross will be; Rr, Rr, rr, rr, which means there 50 percent Rr or heterozygous and 50 percent rr, or recessive.

The formula for a heterozygous x homozygous recessive cross is;

Formula: Rr x rr

Offspring;

Geneotypes: 50% Rr, 50% rr, and

Phenotypes: 50% dominant trait, 50% recessive trait