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When an allotetraploid is backcrossed to one of its

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5. When an allotetraploid is backcrossed to one of its progenitor species, a sterile progeny is produced. This sterile individual can be best represented by A) n 1 + n 2 B) 2 n 1 + 2 n 2 C) 2 n 1 D) 2 n 2 E) 2 n 1 + n 2 6. The chromosome constitution of an allotetraploid can be represented by 7. In a triploid of genotype B/b/b , what proportion of gametes will be B? 8. A triploid with five chromosomes in each set (3 n = 15) is discovered. What is the probability of a meiosis in which all univalents pass to the same pole? 12. A wild-type chromosome can be represented as ABC DEFGH, and from this a chromosomal aberration arises that can be represented ABC DEGFH. (Note: the “dot” denotes the centromere.) This is known as A) deletion. B) translocation. C) duplication. D) pericentric inversion. E) paracentric inversion.
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Test Bank: Chapter Nineteen
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