nps5F4A.tmp - TAKE-HOME QUIZ BIS101D Fall 2009 Name 1 If...

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TAKE-HOME QUIZ BIS101D Fall 2009 Name: 1. If genes assort independently, a selfed dihybrid AaBb typically produces progeny phenotypes in a ratio (assume complete dominance): (2 pt) 2. If genes assort independently, a testcrossed dihybrid typically produces progeny phenotypes in a ratio (assume complete dominance): (2 pt) 3. If genes assort independently, gametes with the following genotypes will be produced by the trihybrid Aa Bb Cc : (2 pt) 4. A couple are both heterozygous for two autosomal recessive diseases: cystic fibrosis (CF) and phenylketonuria (PKU). What is the probability that their first child will have either CF or PKU (not both)? (2 pt) 5. In guinea pigs B = black and b = brown. In one laboratory cross the records of the parents had been lost, but the progeny was all black. Certain pairs of progeny were mated repeatedly over a number of years, each cross producing numerous offspring. Some of these crosses produced only black progeny and some produced black and brown progeny in a ratio 3 : 1.
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