Exam 19: Population Genetics and Human Evolution

Changes in the allele frequencies in a large population are mainly due to migration.

The sum total of all the genes in an interbreeding population is the gene pool.

Because of the ____________________ effect, traits carried by early settlers are found in a large fraction of the population.

Genomic studies of Neanderthals, modern humans, and chimpanzees confirms which of the following?

To a geneticist, races are populations of the same species where allele frequences differ by _________ percent to ___________ percent.

It has been suggested that the allele for cystic fibrosis may confer some protection against

Selection has obviously affected the frequency of alleles for sickle cell hemoglobin and perhaps the frequencies for cystic fibrosis. What factors might be responsible for inter-population differences in other alleles such as the ABO system?

If .04 percent (.0004) of the people in a population have sickle cell anemia, the percent of heterozygotes in the population must be ____________________.

In areas where malaria is endemic, sickle cell disease heterozygote carriers are less fit than individuals homozygous for the normal allele.

According to Darwin, fitness is a measure of

The ____________________ provides a means of measuring allele frequencies in the population.