7. White wool (WW, Ww) and brown eyes (BB, Bb) are dominant traits in sheep, while black wool (ww) and blue eyes (bb) are recessive. Determine the results of a cross between a sheep with black wool and brown eyes (Bb) and a sheep with white wool (WW) and blue eyes.

Question

Biology

Jerry Douglas

2 January, 11:12

7. White wool (WW, Ww) and brown eyes (BB, Bb) are dominant traits in sheep, while black wool (ww) and blue eyes (bb) are recessive. Determine the results of a cross between a sheep with black wool and brown eyes (Bb) and a sheep with white wool (WW) and blue eyes.

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Answers (1)

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Alvin Kelley · Answer 1

1/2 wWBb, White wool and brown eyes.

1/2 wWbb, White wool and blue eyes.

Explanation:

White wool (W) is dominant over black wool (w).

Brown eyes (B) is dominant over blue eyes (b).

A sheep with black wool (ww) and brown eyes (Bb) is crossed with a sheep with white wool (WW) and blue eyes (bb).

wwBb x WWbb

If there is independent assortment between genes, the genotypes of the first parent's gametes will be wB and wb. The gametes of the second parent can only be Wb.

The resulting offspring will be:

1/2 wWBb, White wool and brown eyes. 1/2 wWbb, White wool and blue eyes.