Scientists study the possible effects of human activity on the genetic variations within members of two populations of sparrows, A and B, that live within similar ecosystems. Population A lives in a recreational campsite while population B lives in a nature preserve. Both populations exhibit similar genetic variation between the parent population and second generation. However, a tornado touches down in the habitat of population A during the lifespan of the second generation. Which statement best describes the predicted difference between the third generation of the two populations? A - Population B underwent a speciation that will lead to an increase in the genetic variation of the third generation compared to population A due to natural selection. B - Population A underwent a speciation that will lead to an increase in the genetic variation of the third generation compared to population B due to natural selection. C - Population B underwent a bottleneck effect that will lead to a decrease in the genetic variation of the third generation compared to population A due to genetic drift. D - Population A underwent a bottleneck effect that will lead to a decrease in the genetic variation of the third generation compared to population B due to genetic drift.
Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
Scientists study the possible effects of human activity on the
Population A lives in a recreational campsite while population B lives in a nature preserve. Both populations exhibit similar genetic variation between the parent population and second generation. However, a tornado touches down in the habitat of population A during the lifespan of the second generation.
Which statement best describes the predicted difference between the third generation of the two populations?
A - Population B underwent a
B - Population A underwent a speciation that will lead to an increase in the genetic variation of the third generation compared to population B due to natural selection.
C - Population B underwent a bottleneck effect that will lead to a decrease in the genetic variation of the third generation compared to population A due to genetic drift.
D - Population A underwent a bottleneck effect that will lead to a decrease in the genetic variation of the third generation compared to population B due to genetic drift.
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