Question

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

Explanation:

Step1: Define allele notation

Let $B$ = dominant blue feather allele, $b$ = recessive white feather allele.

Step2: Identify parent genotypes

White bird (recessive) = $bb$. Blue bird must be $Bb$ (to produce white offspring; if it were $BB$, all offspring would be blue, which is not an option here).

Step3: Set up Punnett square

	$B$	$b$
$b$	$Bb$	$bb$

Step4: Calculate blue offspring percentage

Count $Bb$ (blue) genotypes: 2 out of 4. Percentage = $\frac{2}{4} \times 100\% = 50\%$

Answer:

50 percent