WW or ww WW or Ww WW only Ww only
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A "widow's peak" hairline in humans is coded by the dominant allele W. A straight hairline is coded by the recessive allele w. A man with a homozygous dominant WW produces a zygote with a woman with a heterozygous dominant Ww for the trait. Which allele combinations could occur in the zygote?
Possibilities:
- WW or ww
- WW or Ww
- WW only
- Ww only

WW or Ww