Question

In guinea pigs, the allele for black fur (B) is

dominant over the allele for white fur (b).
In a cross between a heterozygous black
guinea pig (Bb) and a homozygous white
guinea pig (bb), what is the probability
that an offspring will have white fur? Use
a Punnett square to answer the question. Pleaseeeee help

Answer 1

Step-by-step explanation:

parental phenotype : black fur 》 white fur

parental genotype: Bb 》 bb

gametes: (B) (b) 》 (b) (b)

random fertilization: (punnet square)

b b

B Bb Bb

b bb bb

f1 generation phenotype: black fur 》 white fur

f1 gen genotype: Bb, Bb 》 bb, bb

percentage: 50% black fur 》 50% white fur

ratio: 1:1

therefore the probability of an offspring having white fur is 50% or 1/2