Exam 19: Evolutionary Change in Populations

You might expect to see an example of the founder effect in:

Figure 19-5 Use the figure to answer the corresponding question(s). -The differential survival rates associated with birth weights in Figure 19-5 illustrate:

If environmental conditions continue to favor one specific group of homozygotes over the rest of the population, then __________ selection will eventually occur.

The Hardy-Weinberg principle shows that if the population is large, inheritance alone does not cause changes in allele frequency. _______

A population in which the allele and genotype frequencies do not change over time is said to be in:

A type of genetic flow called the founder effect occurs when a small number of individuals from a large population form a new colony. _________

When heterozygotes are favored over homozygotes __________ selection occurs.

Due to a rapid change in the environment, a population of ants was reduced from 1 million to 1 thousand.What type of genetic drift will occur in the gene pool of this population when it expands again?

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?

Human MN blood types illustrate the Hardy Weinberg principle because these blood type antigens are not subject to inheritance. ______________

Natural selection acts directly on the genotype of an organism. _______

If a population of 1000 individuals has 160 aa genotypes, assuming simple dominance by the A allele, the phenotype frequency of the dominant phenotype is:

Explain why mutations are almost always neutral or harmful.

The movement of 25-year-old fertile individuals between Mexico and Canada will eventually contribute to:

In nonrandom mating each individual in a population has an equal chance of mating with any individual of the opposite sex.. _________

In nature, genes with the potential to produce serious defects are acted against and kept at a low frequency by:

MATCHING Match the evolution vocabulary definition a.microevolutiom d.cline b.fitness e.balanced polymorphisms c.natural selection -adapts populations organisms to a different type of environment

Balanced polymorphism can be maintained by the combined actions of:

For a particular gene, the frequency of the dominant allele H is 0.65.The total population size is 10,000 individuals.Also, the homozygous recessive condition results in living but sterile offspring. Fill in the table of values for the generations indicated: Generation p q p² 2pq q² 1 2 Does this population exhibit Hardy-Weinberg equilibrium? Why or why not? If not, what assumptions does the Hardy-Weinberg principle make that appear to be inapplicable in this situation?

A long established population that has had no new individuals entering the population would be considered to be in: