GRADED Genetics Problems

GRADED Genetics Problems - BSC 2011 GRADED GENETICS...

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BSC 2011 GRADED GENETICS PROBLEMS Name, please: _____________________________ Spring 2008 Last four digits of SS#: _____________________ In all of the following problems, capital letters will be used to denote a dominant trait, and lower-case letters will be used for the recessive trait. Please show all work (Punnett squares, multiplication, addition, “thought process”, etc.) for full credit. 1. (a) In peas, seeds may be round (R) or wrinkled (r). What proportion of the offspring in an RR x rr cross would be expected to be wrinkled? (b) In peas, seeds may be yellow (Y) or green (y). What proportion of the offspring in a YY x Yy cross would be expected to be yellow? (c) In peas (again), the stem length may result in a tall (T) or dwarf (t) plant. What proportion of the offspring in a Tt x Tt cross would be expected to be tall, and what proportion dwarf? (d) What proportion of the plants from crossing TtYYRr x ttYYrr would be tall with yellow, wrinkled seeds?
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2. Assume that D, E, F, G, H, and I are autosomal genes on different chromosomes.
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GRADED Genetics Problems - BSC 2011 GRADED GENETICS...

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