Exam 5: Ecological Genetics: Adaptation and Natural Selection

The identity of the alleles at a given locus is the

________ is the movement of individuals between local populations.

The mechanism of evolution proposed by Darwin is

Evolution is defined as a change in phenotypic frequencies over time in a population.

Organisms can respond to both temporal and ________ changes in the environment.

Genes are arranged in threadlike bodies called chromosomes.

Does natural selection play any role in the fitness of hybrids? How is hybridization different than ecological speciation?

Inbreeding is usually beneficial to a population because it increases genetic diversity.

Bacteria may acquire genes that confer antibiotic resistance in all of the following ways EXCEPT

What colour are the eyes of a bird heterozygous for eye colour (A = yellow, a = blue)?

Describe the differences between stabilizing, disruptive, and directional selection.

Ecotypes are variants within a species that are adapted to local environmental conditions.

Explain the ecotype concept.

In relationship to natural selection and subsequent evolution, fitness

Variation within and among species would increase dramatically if the environment were homogeneous.

Multiplication of chromosomes, allowing for fertile hybrid offspring, is known as

The effect of positive assortative mating is to

All living things assimilate energy, reproduce, and respond to stimuli.

The ability of a genotype to give rise to a variety of phenotypic expressions under different environmental conditions is called ________.

Charles Darwin advocated a theory of evolution by individuals acquiring useful characteristics during their lifetimes.