Question

question 41 in small populations, gene frequencies can change drastically by chance alone. this phenomenon is: o genetic drift o density - independent effects o density - dependent effects o migration

Explanation:

Genetic drift refers to random changes in gene frequencies, especially prominent in small populations. Migration involves movement of individuals between populations. Density - dependent and density - independent effects relate to population growth factors (e.g., competition for resources - density - dependent; natural disasters - density - independent). The question specifically mentions "gene frequencies can change drastically by chance alone" which aligns with genetic drift.

Answer:

genetic drift