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What is the most important missing evidence or observation in Darwin's theory of 1859?
a. the source of genetic variation
Which hypothesis of inheritance, common at Darwin's time, caused many to question the ability of natural selection to bring about adaptation in populations?
b. blending hypothesis
Which definition of evolution would have been most foreign to Charles Darwin during his lifetime?
a. change in gene frequency in gene pools
Even in Darwin's time, the blending hypothesis was incompatible with observed facts. If the blending hypothesis were true, then what should one expect to observe over the course of generations?
c. Members of a breeding population should become more uniform in phenotype.
What is true of the modern evolutionary synthesis?
E) It exemplifies the tentative nature of scientific knowledge.
What is the most reasonable conclusion that can be drawn from the fact that the frequency of the recessive trait (aa) has not changed over time?
B) The two phenotypes are about equally adaptive under laboratory conditions.
What is the estimated frequency of allele a in the gene pool?
What proportion of the population is probably heterozygous (Aa) for this trait?
All of the following are criteria for maintaining Hardy-Weinberg equilibrium involving two alleles except
A) the frequency of all genotypes must be equal.
In a Hardy-Weinberg population with two alleles, A and a, that are in equilibrium, the frequency of the allele a is 0.7. What is the percentage of the population that is homozygous for this allele?
In a Hardy-Weinberg population with two alleles, A and a, that are in equilibrium, the frequency of allele a is 0.7. What is the percentage of the population that is heterozygous for this allele?
In a Hardy-Weinberg population with two alleles, A and a, that are in equilibrium, the frequency of allele a is 0.2. What is the frequency of individuals with Aa genotype?
In a population with two alleles, A and a, the frequency of a is 0.50. What would be the frequency of heterozygotes if the population is in Hardy-Weinberg equilibrium?
Most copies of harmful recessive alleles in a sexual species are carried by individuals that are
D) heterozygous for the allele.
In a population with two alleles, A and a, the frequency of A is 0.2. Organisms that are homozygous for A die before reaching sexual maturity. In five generations, what would be the frequency of individuals with aa genotypes?
E) greater than 0.64
You sample a population of butterflies and find that 42% are heterozygous for a particular gene. What would be the frequency of the recessive allele in this population?
e. Allele frequency cannot be estimated from this information.
What is the frequency of the A allele?
What is the frequency of the B allele?
What percentage of the population has type O blood?
If there are 4,000 children born to this generation, how many would be expected to have AB blood under the conditions of Hardy-Weinberg equilibrium?
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