Stabilizing selection favors what?

intermediate variants in a population and culls extreme variants from the population.

All of the following conditions are required for Hardy-Weinberg equilibrium except __________.

natural selection , dont need natural selection

Which of the following would seem to be an example of neutral variation?

Human fingerprints Homozygosity of the cheetah population is an example of a population with no variation. Polymorphic varia tions in the Galápagos finches are adaptive and selective . The founder effect reduces the amount of variation in a population .

Antibiotic resistance in bacteria is an example of which of the following?

Directional selection: BECAUSE it favors those individuals at one end of the spectrum that best adapt to a new situation; in this case, the presence of an antibiotic.

Which of the following is the best example of gene flow?

Wind blows pollen from one population of plants to another and cross-fertilization occurs.

At what level does gene variability quantify genetic variation?

gene variability quantifies genetic variation at the whole-gene level.

which of the following sets of conditions is required for Hardy-Weinberg equilibrium?

No mutations. Random mating. No natural selection. Extremely large population size No gene flow.

what are the characteristics of genetic drift

1. los of genetic variation in population 2.can cause harmful alleles to be fixed in population 3.works in smal populations 4.causes allele frequencies to change at random

No two people are genetically identical, except for identical twins. The main source of genetic variation among human individuals is __________.

the reshuffling of alleles in sexual reproduction

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what is disruptive selection

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A population of squirrels is preyed on by small hawks. The smaller squirrels can escape into burrows. The larger squirrels can fight off the hawks. After several generations, the squirrels in the area tend to be very small or very large.
What process is

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ch 23

exam 1

Question	Answer
what is disruptive selection	favors both individuals at both ends of phenotypic spectrum
A population of squirrels is preyed on by small hawks. The smaller squirrels can escape into burrows. The larger squirrels can fight off the hawks. After several generations, the squirrels in the area tend to be very small or very large. What process is	disruptive selection
Point mutations in noncoding regions of DNA result in __________.	neutral variation
Stabilizing selection favors what?	intermediate variants in a population and culls extreme variants from the population.
All of the following conditions are required for Hardy-Weinberg equilibrium except __________.	natural selection , dont need natural selection
Which type of selection maintains stable frequencies of two or more phenotypic forms in a population?	balancing selection
Which of the following would seem to be an example of neutral variation?	Human fingerprints Homozygosity of the cheetah population is an example of a population with no variation. Polymorphic varia tions in the Galápagos finches are adaptive and selective . The founder effect reduces the amount of variation in a population .
Antibiotic resistance in bacteria is an example of which of the following?	Directional selection: BECAUSE it favors those individuals at one end of the spectrum that best adapt to a new situation; in this case, the presence of an antibiotic.
Which of the following is the best example of gene flow?	Wind blows pollen from one population of plants to another and cross-fertilization occurs.
At what level does gene variability quantify genetic variation?	gene variability quantifies genetic variation at the whole-gene level.
which of the following sets of conditions is required for Hardy-Weinberg equilibrium?	No mutations. Random mating. No natural selection. Extremely large population size No gene flow.
what are the characteristics of genetic drift	1. los of genetic variation in population 2.can cause harmful alleles to be fixed in population 3.works in smal populations 4.causes allele frequencies to change at random
No two people are genetically identical, except for identical twins. The main source of genetic variation among human individuals is __________.	the reshuffling of alleles in sexual reproduction
Which type of mutation plays the most important role in increasing the number of genes in the gene pool?	Duplication

Created by: tayusf

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