BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<
BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<
12th Edition
ISBN: 9781264058167
Author: Raven
Publisher: MCG CUSTOM
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Chapter 54, Problem 3S

Refer to figure 55.14. Because the number of offspring that a parent can produce is often a trade-off with the size of individual offspring, many circumstances lead to an intermediate number and size of offspring being favored. If the size of an offspring was completely unrelated to the quality of that offspring (its chances of surviving until it reaches reproductive age), would you expect parents to fall on the left or right side of the x-axis (clutch size)? Explain.

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Genes at loci f, m, and w are linked, but their order is unknown.  The F1 heterozygotes from a cross of FFMMWW x ffmmww are test crossed.  The most frequent phenotypes in the test cross progeny will be FMW and fmw regardless of what the gene order turns out to be.  What classes of testcross progeny (phenotypes) would be least frequent if locus m is in the middle? What classes would be least frequent if locus f is in the middle? What classes would be least frequent if locus w is in the middle?

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BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<

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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY