Which statement is correct about a bottleneck event? (1 point)
Responses
A bottleneck event decreases the gene pool of a population.
A bottleneck event increases the population of a species permanently.
A bottleneck event increases the gene pool of a population.
A bottleneck event decreases the population of a species permanently.
A bottleneck event decreases the gene pool of a population.
Why are the gene pools of small populations reduced compared to those of larger populations? (1 point)
Responses:
inbreeding
lack of advantageous traits
lack of suitable mates
bottleneck events
Bottleneck events.
A bottleneck event reduces the population of bears in one area by 80%. Which statement is correct about the bears’ gene pool? (1 point)
Responses
It has temporarily increased, so disadvantageous traits are more likely to be passed on.
It has temporarily decreased, 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 increased, so disadvantageous traits are less likely to be passed on.
It has temporarily decreased, so disadvantageous traits are more likely to be passed on.
Which information helps scientists determine the survival probability of a population?(1 point)
Responses
the feeding habits of an individual in the population
the level of genetic variation in the population
the number of offspring of an individual in the population
the existence of natural selection in the population
the level of genetic variation in the population.
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To determine which statement is correct about a bottleneck event, we need to understand what a bottleneck event is and its effects on a population.
A bottleneck event is a sudden and severe reduction in the size of a population. It can be caused by various factors such as natural disasters, disease outbreaks, or human activities. During a bottleneck event, a large proportion of individuals in a population are killed or otherwise prevented from reproducing, leading to a significant decrease in population size.
Based on this definition, we can eliminate options 2 and 3 since a bottleneck event results in a decrease, not an increase, in population size.
Now we need to consider the effects of a bottleneck event on the gene pool of a population. The gene pool refers to the collection of all the genes and their different alleles present in a population.
A bottleneck event can have a significant impact on the gene pool because the surviving individuals are a random sample of the original population. As a result, certain alleles may be overrepresented or underrepresented in the surviving population compared to the original population.
Considering this, option 1 is the correct statement about a bottleneck event. A bottleneck event decreases the gene pool of a population.