Multiple Choice
Which of the following is the best example of gene flow?
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22. Evolution of Populations
Genetic Variation
Back22. Evolution of Populations
Genetic Variation
- Multiple ChoiceWhich of the following most accurately measures an organism's fitness?1472views2rank
- Multiple ChoiceThe lethal genetic disorder Tay-Sachs disease occurs in individuals with two copies of a recessive allele of the responsible gene. Which of the following statements is true?1625views
- Multiple ChoiceAntibiotic resistance in bacteria is an example of which of the following?2405views
- Multiple ChoiceFor several years, scientists have warned doctors of the danger of overprescribing antibiotics such as penicillin. Scientists are concerned because __________.1401views1rank
- Multiple ChoiceA 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 responsible for this outcome?1504views
- Multiple ChoiceBirds with average-size wings survived a severe storm more successfully than other birds in the same population with longer or shorter wings. If severe storms occur regularly, then over time, one should expect these storms to bring about __________.1503views
- Multiple ChoiceWhich type of selection maintains stable frequencies of two or more phenotypic forms in a population?1494views
- Multiple ChoiceSelection that acts over evolutionary time to preserve traits that increase an individual's ability to mate is known as __________.1314views
- Multiple ChoiceWhich statement below is true about sexual selection?1952views
- Multiple ChoiceA number of mosquito populations today are resistant to insecticides that were once quite effective. Biologists think that insecticide resistance evolved in mosquitoes because __________.1420views
- Multiple Choice
Which process ensures that alleles are always found in new combinations?
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Mutations that don’t impact the fitness of an allele can be called?
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Which of the following statements about mutations is correct?
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Gene trees are evolutionary trees that show the evolutionary lineages of specific genes separate from organisms. Below is a gene tree for the genes that code for opsins in humans. Opsins are the light sensitive proteins in the eyes. Humans have four opsins that are active in visual perception: long-wavelength sensitive (LWS or red-sensitive), medium-wavelength sensitive (MWS or green sensitive), short-wavelength sensitive (SWS or blue sensitive), and rhodopsin (RH, not color sensitive). Which mutational process would be most likely to create a gene tree like this?
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