RPS3a-1 - Anth005 Name:EugeneAIchinose,ProblemSet#3...

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Anth 005 Name: EugeneA Ichinose, Problem Set # 3 1. Let’s think about the evolutionary process in genetic terms.   Remember that the prerequisites for natural selection are:  (1) heritable (2) variation that (3) affects reproduction.   A. Alleles are the variants that natural selection is ultimately choosing among; how do these variants differ at the  molecular level? The difference is located in the DNA sequence. B. How is it that these variants are transmitted to offspring? The parents of the variants reproduce and have children. C. What effect does recombination have on this variation? For a recessive allele, it won’t be expressed in heterozygotes. However, if a heterozygote and a heterozygote get together,  then one quarter of their offspring (on average) will display the phenotype. This is called recombination via sexual  reproduction. D. How do these variants arise in the first place?  They arise through mutations. E. So, when selection is favoring allele C over allele D, what is happening?  In other words, describe the process that is  causing C to increase in frequency in the population.   On average, the individuals with allele C tend,  to have more viable descendants than the those with the D allele.
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