Genetic Variation Slides

Multiple Choice

Why do you think the beaks of these finches are different from each other?

• Because they live in different climates

• Because they eat different types of food

• Because they are different ages

• Because they are different genders

Multiple Choice

What is a population in biological terms?

• A group of different species living together

• A group of individuals of the same species living in the same area that breed with each other

• A group of individuals of the same species living in different areas

• A group of individuals that do not breed with each other

Multiple Choice

Which of the following statements about diversity within a population is correct?

• Less diversity increases the chances of survival during environmental changes.

• Greater diversity within a population increases the chances for survival during environmental changes.

• Diversity has no effect on survival chances.

• Diversity only affects individual fitness, not population survival.

Multiple Choice

What is an allele?

• A type of chromosome

• A different version of a gene

• A type of cell

• A genetic mutation

Open Ended

Which allele would have a higher frequency in the gene pool: B allele (70%) or b allele (30%)? Is this allele dominant or recessive?

Multiple Select

Which of the following are factors that affect genetic variation in a population?

• Genetic drift

• Gene flow

• Natural selection

• Environmental pollution

Multiple Choice

What is the main consequence of genetic drift as illustrated by the frog population in the image?

• Increase in genetic diversity

• Decrease in genetic diversity

• No change in genetic diversity

• Introduction of new alleles

Multiple Choice

Gene flow involves the movement of alleles into or out of a population due to which process?

• Mutation

• Migration

• Natural selection

• Genetic drift

Multiple Choice

Which evolutionary mechanism is illustrated by the movement of beetles between two populations in the first two images?

• Gene flow

• Genetic drift

• Natural selection

• Mutation

Multiple Select

Which of the following statements about non-random mating is/are correct?

• It causes new traits to spread more slowly through a population.

• Individuals tend to mate with those similar to themselves.

• It increases the probability that all pairs will mate equally.

• It limits the frequency of certain alleles.

Multiple Choice

What enzyme is missing in people who are lactose intolerant, and what sugar can they not break down as a result?

• Lactase; lactose

• Lactose; lactase

• Amylase; glucose

• Sucrase; sucrose

Multiple Choice

What is the main difference between the beaks of the birds shown in the image, and how might these differences relate to their environment or food sources?

• The beaks are different colors to attract mates

• The beaks are adapted to different types of food sources

• The beaks help the birds fly faster

• The beaks are used for building nests