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Bio 130 – Quiz April 9

Bio 130 – Quiz April 9.

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Bio 130 – Quiz April 9

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  1. Bio 130 – Quiz April 9

  2. Q 1. - Mapping the Distance Between GenesImagine 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. • The recombination rate between locus A and locus C is either 2% or 28%. • The recombination rate between locus A and locus C is probably 2%. • The recombination rate between locus A and locus C is either 2% or 50%. • The recombination rate between locus A and locus C is either 2% or 39%. • The recombination rate between locus A and locus C cannot be predicted.

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

  4. 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? • In mitosis, some chromosomes in triploids have no partner at synapsis, but chromosomes in tetraploids do have partners. • In meiosis, some chromosomes in triploids have no partner at synapsis, but chromosomes in tetraploids do have partners. • In mitosis, some chromosomes in tetraploids have no partner at synapsis, but chromosomes in triploids do have partners. • In meiosis, some chromosomes in tetraploids have no partner at synapsis, but chromosomes in triploids do have partners.

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