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Concepts of Genetics 11th Edition by William Klug,Michael Cummings,Charlotte Spencer,Michael Palladino
Edition 11ISBN: 9781292139456Concepts of Genetics 11th Edition by William Klug,Michael Cummings,Charlotte Spencer,Michael Palladino
Edition 11ISBN: 9781292139456 Exercise 14
An interesting and controversial finding by Wedekind and colleagues (1995) suggested that a sense of smell, flavored with various HLA (human leukocyte antigen) haplotypes, plays a role in mate selection in humans. Women preferred T-shirts from men with HLA haplotypes unlike their own. The HLA haplotypes are components of the major histocompatibility complex (MHC) and are known to have significant immunological functions. In addition to humans, mice and fish also condition mate preference on MHC constitution. The three-spined stickleback ( Gasterosteus aculeatus ) has recently been studied to determine whether females use an MHC odor-based system to select males as mates. Examine the following data (modified from Milinski et al., 2005) and provide a summary conclusion. Why might organisms evolve a mate selection scheme for assessing and optimizing MHC diversity?
The table compares odor-based choices made by gravid females for males with optimal MHC alleles and males with nonoptimal MHC alleles. Gravid females chose different amounts of time (seconds) for exposure to males with optimal MHC alleles versus those with nonoptimal MHC alleles. The number of females spawning when exposed to different males with different MHC complements is also presented in the table.
The table compares odor-based choices made by gravid females for males with optimal MHC alleles and males with nonoptimal MHC alleles. Gravid females chose different amounts of time (seconds) for exposure to males with optimal MHC alleles versus those with nonoptimal MHC alleles. The number of females spawning when exposed to different males with different MHC complements is also presented in the table.Explanation
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Females spend more time with males that ...
Concepts of Genetics 11th Edition by William Klug,Michael Cummings,Charlotte Spencer,Michael Palladino
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