Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 12, Problem 2Q
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In a sexually reproducing organism, each gene is represented by two alleles. The law of segregation suggests that each allele gets dispersed in the offsprings independent of each other. Most of the genetic research has been done on the Drosophila melanogaster.
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In a cross of EeFfGgHh and EEFfGGhh individuals, what is the probability that an EEffGGhh individual can be produced?
Diagram the P1 and F1 crosses, using Mendelian notation, to show the possible genotypes found in each generation. (Remember a diagram is just the cross itself, not the progeny).
But for part A if you cross dd ll x DD LL, won't all the offspring be DdLl (dark colored and long legged), so wouldn't NONE of the offpspring have short legs and light body coloration? Isn't the 9:3:3:1 ratio only for two heterozygous dihybrid crosses? Where is the 25/4 coming from? Could you draw a punnett square to demonstrate.
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Life: The Science of Biology
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