BIOL 2153 : Quiz1
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Biol 2153, sec 1 & 2 name:_______answer key______ Aa bb cc dd ee x aa bb cc dd ee: how many different offspring phenotypes can be produced from the cross? (2pts) 1 x 2 x 1 x 2 x 1 = 4: what proportion of the offspring would be expected to have a heterozygous genotype for all five genes? (2pts) 1/2 x 1/2 x 1 x 1/2 x 1 = 1/8: a couple has two children (child #1 and child #2) together. The father and mother have blood type ab and o, respectively, and they are both secretors. Their first child (child #1) has blood type b, and he is not a secretor. 1/2 x1/4 = 1/8: in penguins, a single gene with two alleles is responsible for feather color. Homozygoous for one allele produces black feathers, and homozygous for the other allele is lethal (the offspring with this genotype die during embryonic development).
