Question

account for long term changes in populations
an organism has two different possible traits, a
and b. a graph of the population is shown right.
which of the following statements is true about
trait b? check all that apply.
it decreased in frequency over time.
it became extinct.
it is carried on a recessive allele.
done

Explanation:

Looking at the graph for Trait B (blue line), we can observe that as the generations progress (x - axis), the population (y - axis) of Trait B is decreasing. At the end of the graph (around generation 80), the population of Trait B is approaching zero, which means it became extinct. Also, since the population is continuously going down over the generations, it decreased in frequency over time. There is no information in the graph to support the claim that it is carried on a recessive allele.

Answer:

It decreased in frequency over time, It became extinct.