BIO 325 - Fall 2007 - TTh 11 to 1230 - Quiz III

BIO 325 - Fall 2007 - TTh 11 to 1230 - Quiz III - III Quiz...

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GENETICS (BIO 325) Fall 2007 T, Th 11:00 – 12:30 PM III Quiz 10/4/07 Total points: 16 __________________________________________________________________________________________________ 1. Two plants are crossed; their genotypes are A/A;B/b;C/c and a/a;B/b;c/c . What phenotypic ratio would be expected among the progeny of this cross if all the three genes display incomplete dominance ? Show the phenotypes of each class using the gene symbols. A/a;B/b;C/c 2 A/a;B/b;c/c 2 A/a;B/B;C/c 1 A/a;B/B;c/c 1 A/a;b/b;C/c 1 A/a;b/b;c/c 1 2. A man is suing his wife for divorce on the grounds of infidelity. Their first child and second child, whom they both claim, are blood groups O and AB, respectively. The third child, whom the man disclaims, is blood type B. Can this information be used to support the man’s case? Explain your answer. The child with the blood group O has the genotype i/i, therefore both parents must be carrying the recessive i allele. The child with the AB blood group indicates that one of the parents has
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BIO 325 - Fall 2007 - TTh 11 to 1230 - Quiz III - III Quiz...

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