Please help! Thank you! QUESTION 9 Case Study Kedsha and lim are referred to a g
ID: 255978 • Letter: P
Question
Please help! Thank you!
QUESTION 9 Case Study Kedsha and lim are referred to a genenc counselor by their pediatrician. They have 3 children, Dari, Ana, and Pablo. Dani is having difficulty seeing and has iwhite hair and very fair skin. Her parents thought she swould butgrow her fair festures. The counselor takes à complete family history and asks f Keosha and Jim are related. Keosha and Jim are not, and were a litle upset by the question! The counselor explains the question is part of the family history intake and that albinism is a recessive trait resulting from lack of the pigment melanin The probability increases if they are related! Pable and Ana have broeen hair and medium/light skin color. Keosha land lim both have lieht brown hair and fair/medium skin color They want to have another child, what is the probability thät their next child will also have the in-born metabplic erron resulting in albinism? Show work Words:0 QUESTION 10 In the above case study question, what is the probability that the unaffected child will be only a carrier for albinism? Path WordsoExplanation / Answer
Ans9:
As the parents are unaffected but one child is affected, so parents must be heterozygous for the trait.
Their genotypes be Aa and Aa.
On crossing, possible offspring are AA,Aa,Aa,aa.
Thus probability that next child will be albino(aa) is 1/4 or 0.25.
Ans10: AA,Aa will be unaffected. But Aa will be carrier. A child has twice probability of being Aa than AA.
Probability=2/3 or 0.67.
Ans11:) It is similar to Q9. The child has 25% chances of developing cftr (recessive trait) and 75% of being unaffected.
Ans12:) false.
Ans14) father can be either AB,AA,AO,OO. Thus OPTION (A),(C),(D) are possible answers!!
Ans 15) yes