Question

multiple-choice question
which of the following describes the genotype if you crossed two chickens with the black and white (bw) alleles?
25% bb
50% bw
25% ww
100% bw
100% black and white
50% black
50% white
rewatch

Explanation:

Step1: Recall Punnett Square for BW x BW

When crossing two chickens with genotype \( BW \), we use a Punnett square. The possible gametes from each parent are \( B \) and \( W \).

Step2: Construct the Punnett Square

	\( B \)	\( W \)
\( W \)	\( BW \)	\( WW \)

Step3: Calculate Genotype Percentages

• \( BB \): 1 out of 4, so \( \frac{1}{4} = 25\% \)
• \( BW \): 2 out of 4, so \( \frac{2}{4} = 50\% \)
• \( WW \): 1 out of 4, so \( \frac{1}{4} = 25\% \)

Answer:

25% BB, 50% BW, 25% WW (the first option with these percentages)