Biology
Grade-8
Easy
Question
Harmful mutations does not get eliminated from the gene pool because
- They are recessive and carried by homozygous individuals.
- They are recessive and carried by heterozygous individuals.
- They are formed repeatedly.
- They show genetic drift.
Hint:
Random, spontaneous mutations constantly generate new alleles in a gene pool, destabilizing genetic equilibrium and creating the potential for adaptation to changing environments. In multicellular organisms, only mutations that affect germ cells become part of the gene pool.
The correct answer is: They are recessive and carried by heterozygous individuals.
- Some harmful mutations are not eliminated from the gene pool because they are probably recessive and carried in a heterozygous state and hence cannot be detected by selection.
- Although harmful, these mutations might not contribute to reducing fitness as they are in a recessive state.
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