CELL DIVISION
MEIOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The offspring are identical to the parents
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the offspring are resistant to viruses
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the offspring are born live, instead of from eggs
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The offspring inherit a wider variety of genetic information
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Detailed explanation-1: -During meiosis, when homologous chromosomes are paired together, there are points along the chromosomes that make contact with the other pair. This point of contact is deemed the chiasmata and can allow the exchange of genetic information between chromosomes. This further increases genetic variation.
Detailed explanation-2: -The greater the variation in genes, the more likely is that individuals in a population will possess the differentiated genes which are needed to adapt to an environment. The theory of natural selection suggests that it is this variety of genes that allows species to evolve, adapt and propagate successfully.
Detailed explanation-3: -It strengthens the ability of species and populations to resist diseases, pests, changes in climate and other stresses. Gene variations underpin their capacity to evolve and their flexibility to adapt.
Detailed explanation-4: -Crossing over is important for the normal segregation of chromosomes during meiosis. Crossing over also accounts for genetic variation, because due to the swapping of genetic material during crossing over, the chromatids held together by the centromere are no longer identical.