Question

b w
b bb bw
w bw ww

in a population of weasels, black (b) and white (w) are co-dominant traits. the heterozygous genotype produces black and white spotted weasels. consider the genetic cross shown in punnett square. if there are 40 baby weasels born as a result of the cross, how many should be black?
a 0
b 5
c 10
d 20

Explanation:

Step1: Identify black genotype

Black weasels have the homozygous genotype BB. From the Punnett square, only 1 out of 4 genotypes is BB.

Step2: Calculate probability of black weasels

Probability of black weasels = $\frac{1}{4}$

Step3: Compute number of black weasels

Multiply total baby weasels by the probability: $40 \times \frac{1}{4} = 10$

Answer:

C. 10