Question

Black coat color is dominant over white coat color in guinea pigs. in addition to coat color, rough coat is dominant over smooth coat.
b. Demonstrate a cross between a heterozygous black/homozygous smooth and homozygous white/heterozygous rough. describe the phenotypes as fractions?​

Answer 1

Answer:

Explanation:

C = dominant black coat

c = recessive white coat

T = dominant rough coat

t = recessive smooth coat

Heterozygous black coat + Homozygous smooth guinea pig genotype:

Cc tt

homozygous white/heterozygous rough:

cc Tt

Punnett Square

After looking at Punnett squares attached, we can see that 1/2 of offspring are either black or white and 1/2 of offspring are either rough or smooth.

Cc - black coat - 2/4 - 1/2

cc - white coat - 2/4 - 1/2

Tt - rough coat - 2/4 - 1/2

tt - smooth coat - 2/4 - 1/2