A few genetics problems?

Question

I have a few problems out of a packet of them that are giving me troubles. These are the problems:


1. An albino hemophilic man marries a normally pigmented, non-hemophilic woman whose father is hemophilic and whose mother was an albino. What is the expected ratio of genotypes and phenotypes among their sons and daughters? (This one is giving my problems because I know hemophilia to be a sen-linked recessive trait, but what about albinism? From what I unerstand there are several types?)


2. In a flock of turkeys, if you found that in some matings you got a ratio of two males to one female, what explanation seems most likely? (I know that poultry, which is ZZmale/ZWfemale, can change sex with operatory procedures, but if there were a sex change, it would either be a ZZxZZ cross, producing all males, or a ZWxZW cross, producing 1 MALE and 2 FEMALES, and a lethal. How can I switch the ratio?)


Thanks if you can help! :)

Answer 1

Number 1 you can figure out if you assume that the albinoism is not sex linked and caused by a single gene. Let's call A normal and a albino. Let's also call XH normal and Xh hemophiliac.

the original cross was Aa/XHXh (mom) x aa/XhY (dad)

The progeny would be:

1/8 Aa/XHXh Normal female
1/8 aa/XHXh albino female
1/8 Aa/XhXh hemophiliac female
1/8 aa/XhXh albino hemo female

1/8 Aa/XHY Normal male
1/8 aa/XHY albino male
1/8 Aa/XhY hemophiliac male
1/8 aa/XhY albino hemo male

The second one I just can't get unless you have the sex determinants reversed (i.e. ZZ is actually female and ZW male). And I've taught genetics for years.

Answer 2

a million. talk over with hwhitemore she has an identical question (canines) and the others i did for her. the coding question, i'm assuming she have been given suitable because she did no longer ask this question 2. A = obtainable B, C and D are out E maximum probable answer TAC GTA ACG ACT --> RNA AUG CAU UGC UGA - B