new method of asking no. with xd
genotype for widow's peak of both male and female is same i.e. heterozygous dominant (ww).
gametes formed by male = w and w,
and that of female = w and w
cross would result in the formation of ww, ww, and ww in 1 : 2 : 1.
one out of four carries homozygous recessive trait i.e. ww or straight hairline.
hence, the probability of offspring without widow's peak is 1/4 or 0.25.