Question

need help with pedigrees

You are a genetic counselor. The data: Henry has a double row of eyelashes, which h is a dominant trait. Both his maternal grandfather and his mother have double eyelashes. Their spouses are normal. Henry is married to Isabella and their first child, Polly, has normal eyelashes. The couple wants to know the chances of any child having a double row of eyelashes. Construct two blank pedigrees. Begin with the maternal grandparents and end with Polly 5. Pedigree 2 (X-linked) Pedigree 1 (autosomal dominant) 6. Pedigree 1: try out a pattern of autosomal dominant inheritance by assigning appropriate 7. Pedigree 2. Try out a pattern of X-linked inheritance by assigning appropriate genotypes 8. Which pattern is correct? genotypes for an autosomal dominant pattern of inheritance to each person in this pedigree. to each person in this pedigree.

Answer 1

Question: 5,6 & 7

edigree į ( Autos。mw domon art) x- sinked hナ h t 4 Notewe are taki 1- Honmys matern rand pahes trn generation Ainae wo ther the couble wants to knod the chancel a double , 4-Isabella 3-Herm row eyelashes For Autosomal dominan h- dominant tit nosma) eyelashes or X - linked e ' double ow eyelashes Xx chromosome, o orma alee

8: Pattern for autosomal dominant inheritance is correct, because According to X-linked inheritance, Polly should be affected ( that means she should have double row eye- lashes) which is clearly not the case.