genetic problems please and its killing my brain?

Question

A blue eyed man, both of his parents are brown eyed, married a brown eyed woman, whose father was brown eyed and whose mother was blue- eyed. What are the genotypes of everyone in the family? (Brown eyes are dominant to blue)

If a man is blue eyed (bb) then his parents are (Bb and Bb) because if they were BB and Bb, or BB and BB. Then there would not be any blue eye offspring.
And for the woman he married is brown eyed so she must be Bb or BB. Her mother is blue eyed so she is bb and her father is brown eyed so he must be BB and Bb. So how do you know if father is BB or Bb!

and
a right handed, blue eyed man, whose father was left handed, marries a left handed, brown eyed woman whose family members have been brown eyed for several generations.( right and brown are controlled by dominnant genes)
so my knowledge tells me that man is RRbb or Rrbb and his father is rr and man married a girl who is llBb or iiBB

Answer 1

Blue eyes man bb His parents Bb Bb heterozygous because they have brown eyes but passed on the recessive gene to their son.
The ladies mother is bb, her father is BB because if he was heterozygous the gene would be passed on to his daughter. She is Bb.

When doing these problems keep the variables the same. Use either R or L for handedness but never both.
The man is Rrbb and the women is rrBB. If the mans father was left handed he is homozygous for the recessive and can only pass on a r to his son. HTH

Answer 2

1) BbxBb => male bb x Bb female <= B_xbb

The womans father can be either homozygous or heterozygous brown there is no way to determine his genotype more accurately with the information given.

2) rr_ _x ? => Rrbb marries rrB_
To be the right handed offspring he must be heterozygous with R coming from his mother since the father only donated an r.
The wife is several generations brown but that does not mean there is no recessive for blue in either parent just that it is less likely.

I agree with you except on the right handed blue eyed man.

Answer 3

1) The blue-eyed man is obviously bb since blue-eye is recessive. The brown-eyed woman must be either Bb or BB, that cannot be answered directly. If the woman were Bb, then there is a 50% chance she will have blue-eyed children and 50% chance she will have brown-eyed (heterozygous) children. If she was BB, then there is a 100% chance that she will have brown-eyed (heterozygous) children.