BIOL 121 (2012) Spring Exam 3

If doubly heterozygous ssnn cactuses were allowed to

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Unformatted text preview: host chromosome. D. The virus preferentially integrates at the sites of active genes. Cactuses with the dominant allele, S, have sharp spines, whereas homozygous recessive ss cactuses have dull spines. Cactuses with the dominant allele, N at an unlinked gene, have spines whereas homozygous recessive nn cactuses have no spines at all. If doubly heterozygous SsNn cactuses were allowed to self- pollinate, the F2 would segregate in which of the following ratios? (4 pts) A. B. C. D. E. F. 9 sharp- spined : 3 dull- spined : 3 sharp and dull spines: 1 spineless 9 sharp- spined : 3 dull- spined : 4 spineless 3 sharp- spined : 1 spineless 1 sharp- spined : 1 dull- spined 1 sharp- spined : 2 dull- spined : 1 spineless 1 sharp spined : 1 dull- spined : 1 spineless 2 BIOL 121 Exam 3 4/23/12 4) NAME: A population consists of 243 AA indivi...
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This note was uploaded on 01/16/2014 for the course BIOL 121 taught by Professor Dustinbrisson during the Fall '11 term at UPenn.

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