Question

Some harmful mutations are not eliminated from the gene pool because

• A. They are recessive and carried by heterozygous individuals
• B. They are dominant and show up more frequently
• C. Genetic drift occur because of a small population
• D. They have future survival value

Answer 1

The correct option is A They are recessive and carried by heterozygous individuals

Answer is option A i.e. "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 the fitness as they are in recessive state. As they are ot detected, they cannot be removed.