Chapter 13 Quiz

Jul 8th, 2016
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Quiz generated from the following book: Biology, the Dynamic Science. Russell, Wolfe, Hertz and Starr. 2008. ISBN 978-0-534-24966-3

Word Count: 2358
Showing Page: 1/5
Chapter 13 GENES, CHROMOSOMES, AND HUMAN GENETICS1.Progeria is a genetic condition in some humansthat causesa.pattern baldness as early as age twenty.b.socially inappropriate vocal outbursts andmuscular twitches.c.a high incidence of cancer with any exposure tosunlight.d.muscular and mental deterioration shortly afterpuberty.e.premature aging which typically leads to deathin the early teens.13.1 GENETIC LINKAGE AND RECOMBINATION2.Linked genes area.genes whose effects combine to affect a singlecharacteristic.different alleles of the same gene.genes that affect two different traits and that leadto a 9:3:3:1 phenotype ratio in a dihybrid cross.genes that do not sort independently due totheir being physically near each other on thesame chromosome.all of theseb.c.d.e.3.Suppose that in studies of genes on the samechromosome you find the following recombinationfrequencies:In this case it would be proper to say that a, c, and b area.b.c.d.e.linked genes.different alleles of the same gene.alternative alleles that are not physically possiblesince the numbers do not add up.linked genes that are not physically possible sincethe numbers do not add up.three of the possible alleles for determining aparticular trait.4.When two genes on the same chromosome arelocated 10 map units from each other, ________ of theoffspring from a test cross for genetic linkage shouldhave a recombinant phenotype.a.over 75%b.about 50%c.about 2

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