Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 15, Problem 11TYK
Consider three genes on the X chromosome: A, B, and C. The recombination frequency between A and C is 20%, the recombination frequency between B and C is 30%, and the recombination frequency between A and B is 50%. What conclusions can be drawn from these data?
- a. A, B, and C will all segregate independently.
- b. A and C will appear linked, but A and B will segregate independently.
- c. The distance along the chromosome between A and B is greater than the distance between A and C.
- d. Both b and c are valid conclusions.
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An initial crossover event will occur between A and B, as indicated in the corresponding image. After this initial event occurs, a second cross over event occurs (not illustrated) involving the products of the first crossover event. Given the chromosome organization below, which two chromatids of the bivalent were involved and between which genes did the second crossover event occur to produce the indicated chromosomes?
a. A B c, A b c, a B C, and a b C
b. A B C, A B C, a b c, and a b c (return to the original crossover depicted in the image, and then determine how the second crossover event produced this arrangement
Which of the following statements best describes the events associated with the recombination of genes?
a.
If two genes are located on the same chromosome, the alleles on non-sister chromatids of homologous chromosomes will segregate together if a crossover does not occur between the two genes.
b.
Any two genes located on the same chromosome are called linked genes.
c.
Crossovers are most likely to occur between linked genes that are close together.
d.
If the alleles in gametes after meiosis are different from those in the parents, the gametes are referred to as recombinant.
Morgan observed a higher number of recombinant offspring involvingeye color and wing length (401 + 318) than recombinants forbody color and eye color (17 + 12). These results occurred because
a. the genes affecting eye color and wing length are fartherapart on the X chromosome than are the genes affectingbody color and eye color.b. the genes affecting eye color and wing length are closer togetheron the X chromosome than are the genes affectingbody color and eye color.c. the gene affecting wing length is not on the X chromosome.d. the gene affecting body color is not on the X chromosome.
Chapter 15 Solutions
Study Guide for Campbell Biology
Ch. 15 - Complete the following summary of Morgans crosses...Ch. 15 - Two normal color-sighted individuals have two...Ch. 15 - In a testcross between a heterozygote tall,...Ch. 15 - With unlinked genes, an equal number of parental...Ch. 15 - The following recombination frequencies have been...Ch. 15 - a. What is the difference between an organism with...Ch. 15 - Prob. 7IQCh. 15 - Prob. 8IQCh. 15 - Mendels law of independent assortment applies to...Ch. 15 - You have found a new mutant phenotype in fruit...
Ch. 15 - Prob. 3SYKCh. 15 - Prob. 4SYKCh. 15 - Thomas Hunt Morgan firmly established the location...Ch. 15 - Prob. 2TYKCh. 15 - Sex-linked traits a. are coded for by genes...Ch. 15 - Prob. 4TYKCh. 15 - Prob. 5TYKCh. 15 - Prob. 6TYKCh. 15 - Prob. 7TYKCh. 15 - Prob. 8TYKCh. 15 - Prob. 9TYKCh. 15 - Prob. 10TYKCh. 15 - Consider three genes on the X chromosome: A, B,...Ch. 15 - Prob. 12TYKCh. 15 - Genomic imprinting a. explains cases in which the...Ch. 15 - Prob. 14TYKCh. 15 - Prob. 15TYKCh. 15 - Suppose that alleles for an X-linked character for...Ch. 15 - Some girls who fail to undergo puberty are found...Ch. 15 - Prob. 18TYKCh. 15 - The genetic event that results in Turner syndrome...Ch. 15 - Prob. 20TYKCh. 15 - Prob. 1GPCh. 15 - Prob. 2GPCh. 15 - Prob. 3GPCh. 15 - Prob. 4GPCh. 15 - Prob. 5GPCh. 15 - Red-green color blindness is caused by a...
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