for white feathers (recessive). according to the punnett square for this cross, what percentage of offspring…

for white feathers (recessive). according to the punnett square for this cross, what percentage of offspring is predicted to have blue feathers? 25 percent 50 percent 75 percent 100 percent

for white feathers (recessive). according to the punnett square for this cross, what percentage of offspring is predicted to have blue feathers? 25 percent 50 percent 75 percent 100 percent

Answer

Explanation:

Step1: Assume alleles

Let B represent the dominant allele for blue feathers and b represent the recessive allele for white feathers. A white - feathered bird has genotype bb. Assume the blue - feathered bird is heterozygous Bb (since we are not given its full genotype details but need to do a cross).

Step2: Set up Punnett square

The cross is Bb x bb. The possible gametes from Bb are B and b, and from bb are b and b. The Punnett square has two columns (gametes from one parent: B and b) and two rows (gametes from the other parent: b and b).

Step3: Fill in Punnett square

The genotypes in the Punnett square are Bb, Bb, bb, bb.

Step4: Calculate percentage

Out of 4 possible genotypes, 2 are Bb (blue - feathered) and 2 are bb (white - feathered). The percentage of blue - feathered offspring (genotype Bb) is $\frac{2}{4}\times100% = 50%$.

Answer:

50 percent