In humans, birth weight is an example of a characteristic affected by stabilizing selection. What does this mean to the long-term average birth weight of human babies? How might the increasing number of Caesarean sections be affecting this characteristic?
What will be an ideal response?
Average birth weight will not change from generation to generation.
This decreases the selection against large birth weights and will allow more individuals with large birth weights to pass the trait to the next generation. Therefore, C-sections tend to create more variation and variance in birth weight.
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