IDNLearn.com helps you find the answers you need quickly and efficiently. Our community provides timely and precise responses to help you understand and solve any issue you face.

The allele for a widow’s peak has complete dominance over the allele for a straight hairline (w). What is the probability of two parents heterogeneous for a widow’s peak (Ww) having an offspring without a widow’s peak? 25 percent 0 percent 50 percent 75 percent

Sagot :

Ww Ww  combinations  WW  Ww    50%

Answer:

Option A

Explanation:

It is given that allele for a widow’s peak (W) is completely dominance over the allele for a straight hairline (w).

Two heterogeneous parents are crossed with genotype (Ww)

Therefore following offspring are produced-

Ww * Ww

WW

Ww

Ww

ww

Thus, out of four only one offspring with genotype (ww) will be without a widow’s peak.

Thus, the probability of having an offspring without a widow’s peak

[tex]\frac{1}{4} * 100\\= 25[/tex]%

Thus, option A is correct