Question

PROBLEM Z Using the information below, construct a pedigree in the space provided and answer the following questions. Ocular albinism is inherited with the X-linked recessive allele a. The X-linked dominant allele A codes for full ocular color. George has ocular albinism. His wife Ginny has full ocular color. Both of Ginny's parents and both maternal grandparents (Ginny's mother's parents) have full ocular color but her great grandmother (the mother of Ginny's maternal grandmother) has ocular albinism. There is no history of ocular albinism in Ginny's father's family. a. Draw the pedigree that shows the familial relationships described in the paragraph above. b. What is the probability that Ginny is a carrier of allele a? c. If Ginny and George have a daughter, what is the probability that she will have ocular albinism? d. If Ginny and George have a son, what is the probability that he will have ocular albinism?

Answer 1

a 5 great & randon andmother Grandmother mother & goo ErgoF Ginny as George male o Daughter o female o male b is albino reped. so its genotype will be taxa I co xo is necessive this dominant . e will contain contain Axa A a because leco one and will come from a fare will come eram a person who is not albin E will have either &txa on TATA.. Joe ☺ so the probability of being carrier will be
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- As George has will be albinirong ito genotype in to. I - Cinay be carrier then, Cinny will have a faxa. so. The prability of being affected daughter will be d icf the ay is career are probab iity of Ginny's becoming carrier is here so the final probability to have a aeffected Cautham tharan daughter will be = 1 4 t = 8

Gimy! So xa xa X X 4 Cenotype George's renotype P If the son af Ayistas 28 the son have to be affected, then i we have to contain a s onton sa chromosomea n Similarly, the an offected son probability of having will be stored
as male will have X and Y chromosomes then if one recessive allele is present (a) then the male will be affected but , to be female 2 X chromosomes is needed so to be ones affected one female needs two a allele.