Question

DUPLICATE. WITH ATTACHMENT

The family tree below shows the trait of color blindness. The only unknown is the mother in the first generation. What must be true about the mother?
A. She is color-blind.
B. She has two recessive color blindness alleles.
C. She has at least one recessive color blindness allele.
D. She only has one X chromosome.

Answer 1

Since you forgot to attach the picture that supports your question, it is not very clear. But according to the given data, It seems like she has at least one recessive color blindness allele. I've found the pic that represents the idea of your task, if you have the same, I recommend you to use C to give the answer.