Bio 130 – Quiz April 9. Q 1. - Mapping the Distance Between Genes Imagine a species with three loci thought to be on the same chromosome. The recombination.

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Bio 130 – Quiz April 9

Q 1. - Mapping the Distance Between Genes Imagine a species with three loci thought to be on the same chromosome. The recombination rate between locus A and locus B is 15% and the recombination rate between locus B and locus C is 13%. Predict the recombination rate between A and C. A.The recombination rate between locus A and locus C is either 2% or 28%. B.The recombination rate between locus A and locus C is probably 2%. C.The recombination rate between locus A and locus C is either 2% or 50%. D.The recombination rate between locus A and locus C is either 2% or 39%. E.The recombination rate between locus A and locus C cannot be predicted.

Q 2. - Mapping the Distance Between Genes Imagine a species with three loci thought to be on the same chromosome. The recombination rate between locus D and locus E is 32% and the recombination rate between locus E and locus F is 40%. Predict the recombination rate between D and F. A.The recombination rate between locus D and locus F is either 8% or 72%. B.The recombination rate between locus D and locus F is probably 8%. C.The recombination rate between locus D and locus F is either 8% or 50%. D.The recombination rate between locus D and locus F is either 8% or 16%. E.The recombination rate between locus D and locus F is miniscule.

Q. 3 - Triploid species are usually sterile (unable to reproduce), whereas tetraploids are often fertile. Which of the following are likely good explanations of these facts? A.In mitosis, some chromosomes in triploids have no partner at synapsis, but chromosomes in tetraploids do have partners. B.In meiosis, some chromosomes in triploids have no partner at synapsis, but chromosomes in tetraploids do have partners. C.In mitosis, some chromosomes in tetraploids have no partner at synapsis, but chromosomes in triploids do have partners. D.In meiosis, some chromosomes in tetraploids have no partner at synapsis, but chromosomes in triploids do have partners.