Blue or green eyes?

Question

I am helping out my Chinese friend.

Which scenario would be true?

Mary's grandmother was Chinese and her grandfather was a redhead with blue eyes.

Together, her father now has very light brown eyes.

Would this be true?

Or

Mary's grandfather had green eyes that's why her father has very light brown eyes.

Which color eyes would produce the very light brown eyes,

the blue or green?

Answer 1

I don't think either specifically does... since certain traits are controlled by multiple inherited genes... so this may be a more complex scenario where the answer is not straight-forward.

Answer 2

you would have to make a punnet square to determine that. all you have to do is google it and it'll tell you the odds of the child coming out with blue or green eyes and the odds of them not coming out with either

Answer 3

I would guess blue. Blue is so light it means that chances are other genes are stronger.

Answer 4

The light brown eyes can't be traced to just one or the other as I've seen both. Sorry.

Answer 5

green eyes

Answer 6

Could be either. Wouldn't necessarily have to have been grandmother or grandfather. Could have been great- or great-great-, or so on. Also, wouldn't have to have anyone with blue, green, or light brown eyes as long as someone with brown eyes had parent or grandparent with light eyes. There would always be the chance for a recessive gene to pop up. Thus the mailman or milkman theory.