Question

(03.04 MC)
Which of the following is an example of a beneficial mutation?

A. Inherited polyploidy causes your body to produce bacteria that will not resist antibiotics.

B. Spontaneous mutations produce polyploidy plants, producing larger and heartier plants.

C. Non-disjunction causes mutations that make some humans resistant to HIV.

D.Mutagens can decrease the rate at which mutations occur in an organism.
vous Question

Answer 1

Mutations are any change in the genetic sequence (nucleotide sequence) of the genome of an organism. Mutations represent the main cause of diversity among organisms.

• An example of a beneficial mutation might be spontaneous mutations that produce polyploidy plants, producing larger and healthier plants (Option B).

• Mutations can be classified into somatic mutations (not inherited) and germinal mutations (eventually inherited).

• When inherited, germinal mutations cause variations in the genetic material (DNA) of the offspring,

• These genetic changes (mutations) can be detrimental, beneficial or neutral.

• The non-disjunction of homologous chromosomes during cell division (meiosis) is well known to cause genetic mutations.

• Beneficial mutations are selected by natural selection, thereby increasing their frequency in the population in the next generations.

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