A Gene Can Be Mutated with No Resulting Functional Change

question 60

Multiple Choice

A gene can be mutated with no resulting functional change in the protein that is produced from that gene if

• A) a codon has changed, but it codes for the same amino acid as the original codon.
• B) RNA polymerase can edit the mutation from the mRNA produced during translation.
• C) the mutation alters the active site of an enzyme.
• D) an entire codon has been removed.

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Definitions:

Hybrid Breakdown

A postzygotic barrier where offspring of cross-species or cross-strain matings have reduced survival rates or fertility.

Gametic Isolation

A form of prezygotic barrier where the gametes (egg and sperm) of two different species are unable to fuse or meet to form a viable zygote.

Hybrid Sterility

A condition in which offspring from the crossing of two different species or distinct parental lines are incapable of producing fertile offspring.

Temporal Isolation

A form of reproductive isolation where two species breed at different times of day, season, or years, preventing interbreeding.