Genetic Analysis: An Integrated Approach (3rd Edition)
Genetic Analysis: An Integrated Approach (3rd Edition)
3rd Edition
ISBN: 9780134605173
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Chapter 10, Problem 12P

A pair of homologous chromosomes in Drosophila has the following content (single letters represent genes):

Chromosome 1  RNMDHBGKWU

Chromosome 2 RNMDHBDHBGKWU 

a. What term best describes this situation?

b. Diagram the pairing of these homologous chromosomes in prophase I.

c. What terms best describes the unusual structure that forms during pairing of these chromosomes?

d. How does the pairing diagrammed in part (b) differ from the pairing of chromosomes in an inversion heterozygote?

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a. What letters are used to represent the short andlong arms of human chromosomes?b. Sketch a schematic diagram of a hypothetical chromosome 3 that has 3 regions with 2 bands each on the short arm and 5 regions with 3 bands each onthe long arm. Label the arms, regions, and bandsand indicate a gene at position 3p32.
In Drosophila, the X chromosomes may become attached to one another (XXn ) such that they always segregate together. Some flies thus contain a set of attached X chromosomes plus a Y chromosome. (a) What sex would such a fly be? Explain why this is so. (b) Given the answer to part (a), predict the sex of the off-spring that would occur in a cross between this fly and a normal one of the opposite sex. (c) If the offspring described in part (b) are allowed to interbreed, what will be the outcome?
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Genetic Analysis: An Integrated Approach (3rd Edition)

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Genome Annotation, Sequence Conventions and Reading Frames; Author: Loren Launen;https://www.youtube.com/watch?v=MWvYgGyqVys;License: Standard Youtube License