Problem Set 2

Problem Set 2 - Nicholas Huynh Anthropology 5 Fall 2009...

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Nicholas Huynh Anthropology 5 Fall 2009 Problem Set # 2 1. A. In Darwin’s day, biologists believed in the theory of “blending” inheritance where offspring are the average of their parents. For instance, if one short individual and one tall individual were sexually crossed, their offspring would always have a height in between that of its parents. If this theory were in fact valid, hereditary variation would disappear from the population in a matter of a few generations instead of advantageous variations developing through natural selection. B. Mendelian genes differ from those of the blending model in that variation is preserved even if certain genotypes (a particular combination of genes) are not expressed. According to Mendel, different varieties of genes are called alleles. Individuals with two of the same alleles are called homozygous and those with two different alleles are called heterozygous. Alleles can be dominant—an allele that results in the same phenotype (observable characteristics of the organism) whether homozygous or heterozygous—or
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This note was uploaded on 11/21/2009 for the course ANTH 5 taught by Professor Gaulin during the Spring '07 term at UCSB.

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Problem Set 2 - Nicholas Huynh Anthropology 5 Fall 2009...

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