Problem Set 1 answers copy

Problem Set 1 answers copy - Problem Set 1 20 points 4 pts...

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Problem Set 1 – 20 points 4 pts for questions 1, 2 pts each for questions 2-9 1) See book – there should be 3 chromosome pairs 2) A) Pollen grains can be FL, Fl, fL and fl B) There are 3 possible outcomes for meiosis in a given germ cell 1:1:1:1 of each genotype, if a crossing-over even occurred 2FL:2fl or 2 Fl:2fL depending on segregation of maternal and paternal chromosomes. C) 1:1 D) Yes Draw this out to see why. 3) A) 400 B) 100 4) Ratio is ¼ white, suggesting that white is recessive and the parents are both heterozygous for the color gene. If either parent were homozygous dominant, no recessive phenotype would ever occur in the progeny. 5) Black iris x blue iris produces all black, therefore black is dominant homozygote (BB) and blue iris plant is bb. All of the progeny are heterozygous Bb. Progeny of self-cross is 1:2:1 BB/Bb/bb or 3:1 black:blue. 6) All are homozygous for that gene. 7)
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This note was uploaded on 02/09/2011 for the course BIOS 20182 taught by Professor Lahn during the Spring '11 term at UChicago.

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Problem Set 1 answers copy - Problem Set 1 20 points 4 pts...

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