Question

identify which of the following two genotype are responsible for the expression of black and smooth phenotype in Guinea pig___ a) BBRR and BbRr b)BBrr and Bbrr c) BBRr and BbRR d)bbRr and bbrr​

Answer 1

two genotype are responsible for the expression of black and smooth phenotype in Guinea pig_

a) BBRR and BbRr

Answer 2

The genotypic combination responsible for the expression of black and smooth phenotype in Guinea pigs will be by the cross between BBrr and Bbrr. (OPTION B).

MENDEL'S LAW OF DOMINANCE -

• In a heterozygous condition, one gene will express and dominate over the expression of another gene.
• In the given genotype of Guinea pig,

BB - Homozygous black

Bb - Heterozygous black

bb - Homozygous white

RR - Homozygous rough

Rr - Heterozygous rough

rr - Homozygous smooth

• The cross between BBrr and Bbrr progeny formed will show black and smooth phenotypic expression in the Guinea pig.