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Question 1

A) Which statement is correct about a bottleneck event? (1 point)
A bottleneck event increases the population of a species permanently.
A bottleneck event decreases the gene pool of a population.
A bottleneck event decreases the population of a species permanently.
A bottleneck event increases the gene pool of a population.
Question 2
A) Why are the gene pools of small populations reduced compared to those of larger
populations? (1 point)
bottleneck events
lack of advantageous traits
lack of suitable mates
inbreeding
Question 3
A) A bottleneck event reduces the population of bears in one area by 80%. Which statement is
correct about the bears’ gene pool? (1 point)
It has temporarily increased, so disadvantageous traits are more likely to be passed on.
It has temporarily decreased, so disadvantageous traits are less likely to be passed on.
It has temporarily decreased, so disadvantageous traits are more likely to be passed on.
It has temporarily increased, so disadvantageous traits are less likely to be passed on.
Question 4
A) Which information helps scientists determine the survival probability of a population? (1 point)
the existence of natural selection in the population
the number of offspring of an individual in the population
the feeding habits of an individual in the population
the level of genetic variation in the populatio

1 answer

Question 1
Correct Statement: A bottleneck event decreases the gene pool of a population.
Bottleneck events occur when a population's size is drastically reduced, leading to a decrease in genetic diversity.

Question 2
Correct Explanation: inbreeding
Small populations are more susceptible to inbreeding, which can lead to a reduced gene pool compared to larger populations, where there is more genetic diversity and less likelihood of mating between close relatives.

Question 3
Correct Statement: It has temporarily decreased, so disadvantageous traits are more likely to be passed on.
A significant reduction in population size can lead to a decrease in genetic diversity and an increased chance of disadvantageous traits becoming more common due to the limited gene pool.

Question 4
Correct Information: the level of genetic variation in the population
The level of genetic variation is crucial for understanding the adaptability of a population and its likelihood of survival, as higher genetic variation typically allows for better resilience to environmental changes and diseases.