Awoman is heterozygous for a rare dominant autosomal genetic disease, neurofibromatosis. she marries a normal man (homozygous recessive for neurofibromatosis), who has red-green color blindness, an x-linked recessive trait. they have children. if the woman is homozygous for normal vision, what is the chance they will have a daughter with color blindness?
a. 100%
b. 50%
c. 0%
d. 25%

Option A

Explanation:

Given -

Man has X-linked recessive trait . Thus its genotype can be represented as

YX'

Woman has normal vision with homozygous genotype i.e "XX"

A cross is carried out between the above two parents thereby producing following offspring -

YX’

XXYXX’

XXYXX’

Out of four offspring two are boy "XY" which do not have Red-Green Color blindness

While the two daughters "XX' " have Red-Green Color blindness

Thus, all the daughters produced have Red-Green Color blindness. Thus the chance of having a daughter with color blindness is 100 percent

Option A

yes its like the dead sea which is full of salt which makes you stay afloat

so yes an egg will float in salt

you go to account and hit delete!

explanation: