Arecessive allele on the x chromosome is responsible for red-green color blindness in humans. alleles are c = normal and c = color blind. a woman with normal vision whose father is color blind marries a color-blind male. what is the probability that this couple's first son will be color-blind? a) 1/4 b) 1/2 c) 2/3 d) 3/4

1/2

Explanation:

The allele for the red-green color blindness is X-linked recessive. The father of the woman was colorblind (X^cY) which means that the woman is a carrier for the allele and has genotype (X^cX). The genotype of the colorblind male would be X^cY. A cross between a carrier woman and a color-blind man would produce progeny in following ratio= 1/2 colorblind daughter: 1/2 normal daughter: 1/2 colorblind son: 1/2 normal son.

Therefore, there is a 50% probability that their first son is colorblind.

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

not too sure but maybe in the hot springs.