In humans, the abo blood type is under control of autosomal multiple alleles. red-green colorblindness is a recessive x-linked trait. if two parents who are both type a and have normal vision produce a son who is colorblind and type o, what is the probability that their next child will be a female who has normal vision and is type o?

1/8

Explanation:

Father: normal vision, type A

Mother: normal vision, type A

They can only produce a colourblind son if female is the carrier for it:

         XC      Xc

XC  XCXC  XCXc

Y     XCY    XcY

XcY son will be colorblind. Hence father has XCY genotype and mother has XCXc genotype for vision.

They can only produce type O son if both of them are heterozygous for type A:

    A    O

A  AA  AO

O  AO  OO

OO son will have type O blood. Hence both father and mother have AO genotype for blood type.

Probability of having a female child=1/2

Probability of having a normal vision female child = 1 since in the first punnett square it has been shown that all female children have normal vision ( half are carriers )

Probability of having type O child = 1/4

Probability of having a female child with normal vision and type O blood = 1/2 * 1 * 1/4 = 1/8

the gravitational force on an object increase as the mass of an object also, im not going to report you, but this question should be under the science category, not health