Question

color-blindness is a x-linked recessive disease under what circumstances will the condition manifest in a child?

Answer 1

@wolfe8

Answer 2

if its a girl and the father has a recessive allele
if it a girl and the mother has a recessive allele
if its a boy enc.

Answer 3

The genes that produce photopigments are carried on the X chromosome; if some of these genes are missing or damaged, color blindness will be expressed in males with a higher probability than in females because males only have one X chromosome (in females, a functional gene on only one of the two X chromosomes is sufficient to yield the needed photopigments).

http://en.wikipedia.org/wiki/Color_blindness

What do you think? :)

Answer 4

thanks so much!

Answer 5

You're welcome. Did it help?

Answer 6

Yesh it helped :D

Answer 7

What was the final answer? :)