Explain how the following figures support the statement “the exception that proves the rule” in sexual selection theory.  Be as thorough as possible, calling on additional traits that may differ between males and females

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Ch 11 Assessment

Spring 2022

 

Instructions

Because this is a take-home assessment, I expect significant detail in your answers. Please be thorough. This is an INDIVIDUAL assessment. Meaning, you may not work collaboratively with your peers. Everything must be written BY YOU and in YOUR OWN WORDS. Have fun with your answers, if you wish (you may find inspiration through discussions with your classmates, but the final product must be your own work).

 

Questions

  1. Explain how the following figures support the statement “the exception that proves the rule” in sexual selection theory.  Be as thorough as possible, calling on additional traits that may differ between males and females. A complete answer will discuss the patterns seen in each species and explain how it relates to the “rule”. (5 pts.)

 

 

 

  1. A group of fungal parasites in the genus Ophiocordyceps manipulates the behavior of their ant hosts by secreting LSD-like compounds into their brains. These “zombie ants” climb high above the ground, attach themselves to twigs, and die. The fungus then develops a fruiting body on the ant, and its spores disperse farther than without the assistance of their zombie ant hosts. The ants in turn, have evolved mechanisms to resist the influence of the fungi. Explain to a Webster University freshman HOW and WHY sexual reproduction (vs. asexual) might affect the evolution of this relationship? A complete answer will discuss all 4 benefits of sexual reproduction that we discussed in class. Submit your answer to https://flipgrid.com/e8aa30c2. (5 pts)

 

  1. Major histocompatibility complex (MHC) genes encode for cell-surface proteins that trigger the adaptive immune response in humans. Human females are, unconsciously, able to detect MHC diversity through smell and facial features, and they preferentially choose mates with (a) more diverse MHC and (b) MHC that is different from their own. Please provide the ultimate explanation for why human females may be able to detect MHC diversity in potential mates and have preferences for those with higher diversity. A complete answer will provide the scientific name for this phenomenon and a detailed description for how it works. (5 pts)

 

 

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