Question

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.

Explanation:

1. For "It decreased in frequency over time": The blue line (Trait B) starts at ~120,000, drops to ~80,000, and ends at ~20,000 across 0-80 generations, showing a steady decrease.
2. For "It became extinct": The population of Trait B never reaches 0, so it is not extinct.
3. For "It is carried on a recessive allele": The graph only shows population size over time, with no data about genetic inheritance patterns, so this cannot be confirmed.

Answer:

It decreased in frequency over time.