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

Fill in the Blank

Genetic drift is a ___ change in the frequency of alleles in a population.

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

Fill in the Blank

Non-random mating limits the frequency of the expression of certain ___.

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

Fill in the Blank

Fill in the blank: If a genetic change increases ___, it will eventually be found in many individuals in the population.

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

Fill in the Blank

Fill in the blank: The ability for a phenotype to survive and be passed on to future generations is called ___.