LABORATORY REVIEW
MITOSIS AND MEIOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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High genetic diversity puts the population at risk to environmental change.
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Low genetic diversity puts the population at risk to environmental change.
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High genetic diversity prevents the population from expanding its territory.
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Low genetic diversity prevents the population from expanding its territory.
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Detailed explanation-1: -Some species are able to reproduce either sexually or asexually. What is a drawback of a population using asexual reproduction only? High genetic diversity puts the population at risk to environmental change.
Detailed explanation-2: -In an unstable or unpredictable environment asexually-reproducing species may be at a disadvantage because all the offspring are genetically identical and may not have the genetic variation to survive in new or different conditions.
Detailed explanation-3: -Solution : (1) If meiosis did not occur, fusion of gametes would result in a doubling of the chromosomes for each successive reproduced generation.
Detailed explanation-4: -b) asexually reproducing organisms can repair their own DNA. This is false.
Detailed explanation-5: -Sexual reproduction is typically advantageous over asexual reproduction because the environment is constantly changing. Sexual reproduction allows new combinations of genes to form. This greater genetic diversity increases the phenotypic variation: that is, it increases the physical variety of the organisms.