M1 Key 2.1999

M1 Key 2.1999 - LS 4 INTRODUCTORY GENETICS MIDTERM I...

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LS 4 INTRODUCTORY GENETICS MIDTERM I Thursday, 2/4/99 5 PM to 6:50 PM Name_______________________________ ID #_________________________________ Discussion Section _____________________ 1 20 2 15 3 20 4 15 5 15 6 15 total 100 SHOW WORK FOR COMPLETE AND/OR PARTIAL CREDIT. FOR ALL QUESTIONS ASSUME COMPLETE PENETRANCE
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1. (20 pts) A cross of purple, short peas with white, tall peas gave all purple, tall F1. When self crossed, the F1 yielded these fractions of F2 progeny: purple tall purple short white tall white short 9/16 3/16 3/16 1/16 How many genes are different between the original parents? 2 Fill out the Punnett square for the F1 self cross, showing the genetically distinct gametes. Define your allele symbols. Show the phenotype of each zygote in the F2, but you don't have to write out each F2 genotype. P = purple, p = white, T = tall, t = short One of the purple tall F2 was crossed with one of the purple short F2. This cross produced progeny in the fractions indicated: purple tall purple short white tall white short 3/8 3/8 1/8 1/8
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What are the genotypes of these two F2 plants? Pp Tt x Pp tt
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This note was uploaded on 11/30/2009 for the course LS 4 taught by Professor Ribaya during the Fall '08 term at UCLA.

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M1 Key 2.1999 - LS 4 INTRODUCTORY GENETICS MIDTERM I...

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