Question

Indicate what specific kinds of mutations would be most harmful to a population of organisms. ​

Answer 1

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Answer 2

In humans, it is estimated that there are about 30 mutations per individual per generation, thus three in the functional part of the DNA. This implies that on the average there are about 3/2000 beneficial mutations per individual per generation and about 1.5 harmful mutations, Although mutation provides the ultimate source of genetic variation, it typically leads to decreased fitness. Even when a population is in the process of adaptation, the majority of its mutations are still deleterious and will ultimately be eliminated by selection, Harmful mutations may cause genetic disorders or cancer. A genetic disorder is a disease caused by a mutation in one or a few genes. A human example is cystic fibrosis. A mutation in a single gene causes the body to produce thick, sticky mucus that clogs the lungs and blocks ducts in digestive organs, Because an insertion or deletion results in a frame-shift that changes the reading of subsequent codons and, therefore, alters the entire amino acid sequence that follows the mutation, insertions and deletions are usually more harmful than a substitution in which only a single amino acid is altered.