Exam 19: Evolutionary Change in Populations

In a certain population, the allele frequencies of the M and N blood group alleles are 0.6 and 0.4, respectively. How many of a population of 500 would be expected to have MN blood type if the population is in genetic equilibrium for the MN locus?

Figure 19-1 Refer to the accompanying figure. Which beetle phenotype has the highest probability of survival?

Discuss how genetic variability is maintained through genetic polymorphism.

The genetic drift that results when a small number of individuals from a large population found a new colony is called the _______________________.

If a population of 1000 individuals has 120 aa genotypes, 460 Aa genotypes, and 420 AA genotypes, what is the allele frequency of the dominant allele (A)?

If an environment changes over time, _______________ may favor phenotypes at one of the extremes of the normal distribution.

Briefly discuss why the Hardy-Weinberg principle is important. Does genetic equilibrium usually occur in nature? How does this affect the usefulness of the Hardy-Weinberg principle?

Under which mating condition is the Hardy-Weinberg principle applicable?

Variation that does not alter the ability of an individual to survive and reproduce, and therefore not an adaptive variation, is called:

In a certain population, the allele causing sickle cell anemia has an allele frequency of 0.2. If the population is in genetic equilibrium for this allele, what fraction of the population would be carriers for the allele (heterozygous individuals)?

The amount of observable variation due to environment can be measured by comparing the number, frequency and kinds of alleles in both parents and offspring.

What is the study of the genetic variability within a population and the forces that change allele frequencies?