Check my answers to a genetics question?

Question

Hey, I have a biology final tomorrow! I'm working on a review sheet but it is just questions without answer, so I don't know if I really understand. Please check my answers to the following multipart question:

A colorbind right-handed man has a child with a right-handed woman whose left-handed father was colorblind. The man's mother was left-handed. What are the chances the couple has:

a. A son who is colorblind and right-handed?

b. A colorblind daughter who is left-handed?

c. A right-handed daughter who is a carrier for color-blindness?

My answers:

a. 1/2

b. 1/8

c. 3/8

Thanks a mil!

Answer 1

I am assuming that for right-handed/left-handed it is just the normal autosomal recessive/dominant relationship

The father is XcY and Rr and the mother is XcX and Rr

A: There is a 75% chance of being right-handed, 50% chance of being male, and a 50% chance of being colorblind, so .75 x .50 x .50 = .1875 --> 3/16

B: There is a 50% chance of being female, 50% chance of being colorblind, and a 25% chance of being left-handed, so .50 x .50 x .25 = .0625 --> 1/16

C: There is a 75% chance of being right-handed, 50% chance of being female, and a 50% chance of being a carrier, so .75 x .50 x .50 = .1875 --> 3/16

I hope that this helps and is understandable!