An endangered species of wildflower has been reduced to a single small population in a mountain meadow. An early spring blizzard
buries and kills all but three of the remaining plants, one of which has a rare allele. The resulting evolutionary change in the population is an example of:
It is because only three members are normal while one of them has a rare recessive allele. Due to parallel evolution, the recessive allele will now become common as the other previously distinguished dominant alleles and now all the traits will be in a uniform equilibrium according to Hardy-Weinberg Theorem.
Bottleneck can be described as a situation whereby a population of an organism is negatively affected through some certain events such as uncontrollable hunting of the specie, destruction of habitat or environmental circumstances or disaster, and results to a reduction of the population.
Bottleneck is known to be a type of genetic drift, and its effect drastically reduces the population size of an organism. It also brings about a random change in the frequency of the alleles, which can be described as an evolutionary change.
In this case, what caused a reduction and evolutionary change of species of wildflower to mountain meadow is bottleneck.
The right answer for the question that is being asked and shown above is that: "C. People can be tested for mutations on these genes." The statement that is true about BRCA1 and BRCA2 genes is that p<span>eople can be tested for mutations on these genes.</span>
