Question

factors affecting genetic variation
quiz complete
1
time remaining
59:12
in a population of seals, most of the seals have similar coloring. however, one seal has albinism. this seal is white
and is almost completely blind. what is most likely the cause of this difference from the rest of the population?
gene flow
natural selection
gene mutation
genetic drift
mark this and return save and exit next submit

Explanation:

• Gene flow involves the transfer of genes between populations. There is no indication of a transfer from another seal population here.
• Natural selection favors traits that enhance survival and reproduction. Albinism (white color and blindness) is likely a disadvantage (not favored by natural selection in a normal seal - habitat context).
• Genetic drift is a random change in allele frequencies in a population, often in small populations. But the key here is the appearance of a new trait (albinism), which is more directly related to a mutation.
• Gene mutation can introduce new genetic variations. Albinism is caused by a mutation in genes related to melanin production. This sudden appearance of a new trait (albinism) in one seal is most likely due to a gene mutation.

Answer:

gene mutation