Answer: The environmental factor that could lead to a decrease in genetic variation in a tuna population is an increase in pollution (second option).

pollution

the amount of genetic variation in a population. Which environmental factor could lead to a decrease in genetic variation in a population of tuna? An increase in food and a decrease in predators would most likely _____________________ genetic variation in a population.

A: An increase in pollution could lead to a decrease in genetic variation in a population of tuna.

Examples of genetic drift are more evident in smaller populations of organisms. 2. A population of rabbits can have brown fur and white fur with brown fur being the dominant allele. By random chance, the offspring may all be brown and this could reduce or eliminate the allele for white fur.

Mutation and genetic drift are two very different events, though they both relate to the genetic qualities of future generations. Mutation and genetic drift can both occur in any species, regardless of size or location. The causes of genetic drift and mutation are varied, though some causes of mutation can be avoided.

Genetic drift is a population level phenomenon while mutation can occur at an individual level. There is lot of difference in the causes which bring in genetic drift and mutations. Genetic drift accounts to random changes in the allelic frequency by chance. Mutations are caused by many factors called as mutagens.

A founder effect occurs when a new colony is started by a few members of the original population. This small population size means that the colony may have: reduced genetic variation from the original population. a non-random sample of the genes in the original population.

GENETIC DRIFT AS A CAUSE OF INBREEDING As we have seen, inbreeding results from drift because alleles become identical by descent (IBD).