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Which of the following is not an observation or inference on which Darwin's theory of natural selection is based?
a. There is heritable variation among individuals.
b. Poorly adapted individuals never produce offspring.
c. Because excessive numbers of offspring are produced there's struggle for limited resources.
d. Individuals whose inherited characteristics best fit them to the environment will generally produce more offspring. |
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Definition
| b. Poorly adapted individuals never produce offspring. |
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Which of the following is a true statement about Charles Darwin?
a. He was the first to discover that living things can change or evolve.
b. He based his theory on the inheritence of acquired characteristics.
c. He proposed natural selection as the mechanism of evolution.
d. He was the first to realize that the Earth is more than 6,000 yrs old. |
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Definition
| c. He proposed natural selection as the mechanism of evolution. |
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| In a population w/ 2 alleles for a particular genetic locus, B & b, the allele frequency of B is 0.7. If this population is in Hardy-Weinburg equilibrium, the frequency of heterozygotes is ___, the frequency of homozygous dominants is ___, and the frequency of homozygous recessives is ___. |
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Definition
| Bb: 0.42; BB: 0.49; BB: 0.09 |
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Term
| Define fitness from an evolutionary perspective. |
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Definition
| The fitness of an individual (or of a particular genotype) is measured by the relative # of genes that it contributes to the gene pool of the next generation compared w/ the contribution of others. Thus the # of fertile offspring produced determines an individual's fitness. |
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