Question

Which mutation is harmful to the organism?
A.
a mutation allowing moths to camouflage better on blackened tree bark
B.
a mutation making Staphylococcus aureus resistant to the antibiotic methicillin
C.
a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell
D.
a mutation causing uncontrolled cell division
E.
a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

Answer 1

Answer:

By the same token, any random change in a gene's DNA is likely to result in a protein that does not function normally or may not function at all. Such mutations are likely to be harmful. Harmful mutations may cause genetic disorders or cancer. A genetic disorder is a disease caused by a mutation in one or a few genes.

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Answer 2

D. A mutation causing uncontrolled cell division is harmful to the organism.

Mutation:

• A mutation is a change in an organism's DNA sequence.
• Mutations can occur as a result of mistakes in DNA replication during cell division, mutagen exposure, or viral infection.
• Any alteration in a cell's DNA sequence.
• Mutations can be generated by errors during cell division or by exposure to DNA-damaging substances in the environment.
• Mutations can be dangerous, helpful, or inactive.
• Mutagens are environmental variables that induce mutations.
• Mutagens might be radiation, chemicals, or pathogenic pathogens.
• Mutations can occur spontaneously in nature.

Harmful mutations:

• Mutations that are harmful can result in genetic diseases or cancer.
• A genetic condition is an illness that results from a mutation in one or more genes.
• Cystic fibrosis is a human example.
• A single gene mutation causes the body to create thick, sticky mucus, which clogs the lungs and inhibits ducts in digestive organs.

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