Review the three types of polygenic selection graphs.
Which type of selection would most likely lead to the most differences in the population, and eventually - speciation.
a
directional selection
b
disruptive selection
c
stabilizing selection
d
Impossible to determine from the data
The three types of polygenic selection graphs are directional selection, disruptive selection, and stabilizing selection.
Directional selection occurs when individuals at one extreme of a trait have a higher fitness than individuals in the middle or at the other extreme. This results in a shift in the average value of the trait over time.
Disruptive selection occurs when individuals at both extremes of a trait have higher fitness than individuals with intermediate trait values. This can result in the population splitting into two separate groups with distinct trait values.
Stabilizing selection occurs when individuals with intermediate trait values have higher fitness than individuals at the extremes. This reduces genetic variation in the population over time.
Disruptive selection would most likely lead to the most differences in the population and eventually speciation. This is because disruptive selection leads to the divergence of traits within a population, ultimately resulting in the formation of new separate species as individuals with different trait values mate preferentially with each other.