A colony of woolly-winged bats inhabited an isolated cave in Canada. Some of the bats had light- brown wings, a recessive trait, and the others had dark-black wings, a dominant trait. A freak cave flood randomly killed 98% of the bats. By chance all the survivors had light-brown wings. Which of the following statements best describes the situation? O The allele frequency for wing color was altered by genetic drift. Individual with light-brown wings were favored by natural selection, which altered the allele frequency in the population; an example of directional selection. O Even if no new bats arrive in the area, genetic mixing in the surviving population will insure future generations will contain both wing color variations. O This is an example of sympatric speciation. O Since the dark-black wing color is a dominant trait, it is likely to reappear in the population within a few generations, thus restoring Hardy-Weinberg equilibrium.
A colony of woolly-winged bats inhabited an isolated cave in Canada. Some of the bats had light- brown wings, a recessive trait, and the others had dark-black wings, a dominant trait. A freak cave flood randomly killed 98% of the bats. By chance all the survivors had light-brown wings. Which of the following statements best describes the situation? O The allele frequency for wing color was altered by genetic drift. Individual with light-brown wings were favored by natural selection, which altered the allele frequency in the population; an example of directional selection. O Even if no new bats arrive in the area, genetic mixing in the surviving population will insure future generations will contain both wing color variations. O This is an example of sympatric speciation. O Since the dark-black wing color is a dominant trait, it is likely to reappear in the population within a few generations, thus restoring Hardy-Weinberg equilibrium.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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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.
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Transcribed Image Text:A colony of woolly-winged bats inhabited an isolated cave in Canada. Some of the bats had light-
brown wings, a recessive trait, and the others had dark-black wings, a dominant trait. A freak cave
flood randomly killed 98% of the bats. By chance all the survivors had light-brown wings. Which of
the following statements best describes the situation?
The allele frequency for wing color was altered by genetic drift.
O Individual with light-brown wings were favored by natural selection, which altered the allele frequency
in the population; an example of directional selection.
O Even if no new bats arrive in the area, genetic mixing in the surviving population will insure future
generations will contain both wing color variations.
O This is an example of sympatric speciation.
Since the dark-black wing color is a dominant trait, it is likely to reappear in the population within a few
generations, thus restoring Hardy-Weinberg equilibrium.
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