Quiz V-answers - A haploid cross of the form CD X cd is...

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Quiz V. May 8, 2009 BIO 325 Genetics – by Sung Write your name: (10 points total) Q 1-2 (1 point ea.). Choose the best matching word for each question from the followings. meristem; shoot; root; stem; whorl; inflorescence; strains Q1. Collection of undifferentiated cells in plants meristem Q2. Group of flowers at the tip of branch inflorescence Q3. (2 points) If the a and b loci are 20 m.u. apart in humans and an AB / ab woman mates with an ab / ab man, what is the probability that their child will be Ab / ab ? 10% Q4. (1 point) From Q3 above, what is the probability that the couple have first two children both with Ab / ab ? 1% Q5 ~ 7. Two genes are located on the same chromosomes as follows c---------------X--------------------------d ; X = centromere; c-X: 7 m.u. ; X-d: 15 m.u.
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Unformatted text preview: A haploid cross of the form CD X cd is made and obtained 1,000 asci. Q5. (2points) How many asci of NPD (Non parental ditype) would you expect if the cross was made between strains of Saccharomyces cerevisiae and the interference in this region = 1? 0 Q6. (2points) How many asci of PD (parental ditype) would you expect if the cross was made between strains of Saccharomyces cerevisiae and the interference in this region = 1? Recombination frequency between C and D is 22% NPD + 1/2T 22 = ------------------------- X 100 , as NPD = 0 when the interference =1, T = 2 X 220 = 440 1000 PD = 1000-440 = 560 Q7. (1 point) How many asci of NPD would you expect if the cross was made between strains of Neurospora crassa and the interference in this region = 1? 0...
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