Hi there!
Use the following hypothetical information to answer the next two questions.
Eye colour in humans appears to be controlled by multiple alleles. The green allele and the brown allele are dominant to blue. Green eye colour is expressed only in the absence of a brown allele.
Red-green colour blindness is a sex-linked trait. Red-green colour blindness (Xrg) is the inability to distinguish between red and green. The (Xrg) allele follows the pattern of recessive inheritance.
Legend: Brown eyes (B), blue eyes (b), Green eyes (G), red-green color blindness (Xrg), and X not colour-blind or normal vision.
A colour-blind male with brown eyes and his green-eyed wife who has normal vision have a daughter who is colour-blind and has blue eyes. What is the genotype of this child?
1)
Select one:
a. XrgXrgBb
b. XrgYbb
c. XrgXrgGb
d. XrgXrgbb
2)
In some species the male sex chromosomes are homozyogus while the female sex chromosomes are heterozygous. This occurs in some birds, lizards, and insects. The alleles distributed to male and female gametes, respectively, from this type of species are
Select one:
a. both male and female gametes would be: WZ, Wz, wZ, and wz
b. male: Z, Z - female: Z, W
c. male: WW - female: ZW
d. male: Ww, Ww - female: Zz, Ww
Sorry about the long read.. Thank you!
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