Bio+97+Worksheet+6+Key - Bio 97 Worksheet 6 1 A plant of...

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Bio 97 Worksheet 6 1) A plant of genotype is test crossed to If the two loci are 10 m.u. apart, what proportion of progeny will be A B / a b ? (Assume that only 45% progeny are ab/ab). (100 – 10)/2 = 45 10 percent recombination so 90% will be parental – 45% ab/ab, 45% AB/ab Loci are close to each other. Therefore, we will see small percentage of recombination (10%). The remainder will have the parental genotype (either ABab or ABab) 2) The frequency of crossing-over between linked genes A and B is 35%; between B and C is 10%; between C and D is 15%; between C and A is 25%; between D and B is 25%. The sequence of the genes on the chromosome is: a) ACDB b) ACBD c) ABDC d) ABCD e) ADCB
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3) In squash plants, the three genes thin leaf (T), large fruit (L), and green flowers (G) are linked. You decide to determine the gene map for these three genes as part of your final project. When your cross two true breeding plants together the following set of offspring are produced:
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