In humans,"unattached" earlobes are dominant over "attached" earlobes.Widow's-peak hairline is dominant over non-widow's-peak hairline.Use E and e for the earlobe phenotype alleles and W and w for the hairline phenotype alleles.A woman and a man,both with genotype EeWw,have a child.What is the probability that the child will have attached earlobes and a widow's peak?

Question

Quizplus · Accepted Answer

When writing out the Punnett square for the cross between the parents, we get:
  E   e
W EW  eW
w Ew  ew
From this, we can see that there is a 3/16 chance of the child having attached earlobes and a widow's peak (eW and ew). Therefore, the answer is E.

In Humans,"unattached" Earlobes Are Dominant Over "Attached" Earlobes