Week+7+Problems - (2) 46% AaDd, 4% Aadd, 46% aadd, 4% aaDd...

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Question 1 A black hamster(1) is crossed with an albino hamster and the mating produces 12 offspring – all black. When the albino (same as before) is now crossed with a second black hamster (2), 12 offspring are born - 7 black and 5 albino. What are the dominant and recessive phenotypes? What are the genotypes for the parents and the offspring in both crosses? Question 2 You are interested in mapping 3 genes that you know are found on a chromosome, but you don ʼ t know in what order. You perform the following crosses to determine their map order: (1) AaBb x aabb (2) AaDd x aadd (3) BbDd x bbdd You get offspring with the following genotypes: (1) 40% AaBb, 42% aabb, 10% Aabb, 8% aaBb
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Unformatted text preview: (2) 46% AaDd, 4% Aadd, 46% aadd, 4% aaDd (3) 44% BbDd, 44% bbdd, 6% Bbdd, 6% bbDd What is the best map (order) of these 3 genes? Question 3 The above is a pedigree tracing an inheritable genetic disease across 4 generations. Individuals with the disease are flled in black. Is this disease dominant or recessive? Is this disease sex-linked or autosomal? IF the parents in the third generation (marked with the *) had another daughter, what is the probability that she will not have the disease? Question 4 What is the probability that each oF the Following pairs oF parents will produce the indicated oFFspring? AABBCC x aabbcc AaBbCc aaBbCC x AABbcc AaBbCc *...
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Week+7+Problems - (2) 46% AaDd, 4% Aadd, 46% aadd, 4% aaDd...

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