Exam 1 Review Quizzes

What does this graph depict?

• Sexual Selection

• Stabilizing Selection

• Directional Selection

• Disruptive selection

The gene pool is ___

• 1. The gene pool is the collection of all genes in a population.

• 1. The gene pool is the total number of individuals in a population.

• 1. The gene pool is the process by which genes are passed from parents to offspring.

• 1. The gene pool is the concept that genetic variation within a population is influenced by natural selection.

Some chickens exhibit frizzle feather trait, where their feathers all curl outward and upward rather than lying flat against the body. Frizzle feather was found to stem from a genomic region coding for α-Keratin. This gene seems to lead to other abnormalities like increased metabolism, higher food consumption, accelerated heart rate, and delayed sexual maturity. What is this?

• Epistasis

• Coevolution

• Trade-Offs

• Pleitropy

New alleles can only be formed by:

Which of these is an example of genetic drift?

• A population of birds is split into two groups by a geographical barrier. Over time, the two groups evolve differently due to their isolated gene pools.

• A sudden environmental event, such as a flood, drastically reduces the population of a species, leading to a change in the gene pool of the surviving individuals.

• A small group of individuals from a population migrates to a new area, resulting in a change in the gene pool of the new population due to the smaller initial gene pool of the migrants.

• A mutation occurs in a gene that is not under strong selective pressure, leading to a change in the frequency of that gene in the population over time.

Which of these are NOT a condition for a population to be in HW-Equilibrium?

• There is mutation

• Mating is random

• Population size is extremely small

• There is gene flow

• No selection

What does this graph depict?

• Stabilizing Selection

• Directional Selection

• Disruptive Selection

• Natural Selection

A man has multiple genes coding for his hair. 1 gene codes for blonde hair color. The second gene codes for baldness. The gene for baldness overrides the blonde gene. What is this an example of?

• Natural selection

• Pleiotropy

• Epistasis

• A trade-off

"Two organisms are considered the same species if they look alike and share similar physical characteristics."

What concept does this represent?

• Biological Species Concept

• Morphological Species Concept

• Phylogenetic Species Concept

• Ecological Species Concept

Which type of speciation does this diagram represent?

• Sympatric speciation
• Parapatric speciation
• Allopatric speciation