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Question
Assertion :Cheetah is an example of bottleneck effect. Reason: Bottleneck effect is when population is subjected to near extinction by a natural disaster or slaughter by humans.
Assertion :Cheetah is an example of bottleneck effect. Reason: Bottleneck effect is when population is subjected to near extinction by a natural disaster or slaughter by humans.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
A population bottleneck is a sharp reduction in the size of a population due to environmental events (such as earthquakes, floods, fires, or droughts) or human activities (such as genocide). Such events can reduce the variation in the gene pool of a population. After an event, a smaller population (of animals/people), with a correspondingly smaller genetic diversity, remains to pass on genes to future generations of offspring. Genetic diversity remains lower, only slowly increasing with time as random mutations occur. According to the May 2007 study, female cheetahs seem to be at least as promiscuous as their male counterparts. Females frequently mate with several different males while they are fertile and are then likely to bear a single litter of cubs fathered by multiple males making many of the cubs within a single litter only half-siblings. This discovery has important implications for the conservation of these endangered animals. So, Cheetah is an example of bottle neck effect. So, both Assertion and Reason are correct and Reason is the correct explanation for Assertion. Thus, option A is correct and other options are wrong.
A population bottleneck is a sharp reduction in the size of a population due to environmental events (such as earthquakes, floods, fires, or droughts) or human activities (such as genocide). Such events can reduce the variation in the gene pool of a population. After an event, a smaller population (of animals/people), with a correspondingly smaller genetic diversity, remains to pass on genes to future generations of offspring. Genetic diversity remains lower, only slowly increasing with time as random mutations occur. According to the May 2007 study, female cheetahs seem to be at least as promiscuous as their male counterparts. Females frequently mate with several different males while they are fertile and are then likely to bear a single litter of cubs fathered by multiple males making many of the cubs within a single litter only half-siblings. This discovery has important implications for the conservation of these endangered animals. So, Cheetah is an example of bottle neck effect. So, both Assertion and Reason are correct and Reason is the correct explanation for Assertion. Thus, option A is correct and other options are wrong.
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