EVOLUTION
TYPES OF SELECTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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directional selection
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stabilizing selection
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disruptive selection
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artificial selection
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Detailed explanation-1: -Birth weight is the body weight of a baby at its birth. The average birth weight in babies of European & African descent is 3.5 kilograms (7.7 lb), with the normative range between 2.5 and 4.0 kilograms (5.5 and 8.8 lb). On average, babies of Asian descent weigh about 3.25 kilograms (7.2 lb).
Detailed explanation-2: -Birth weight is a classic example of a trait under strong stabilizing selection, where high and low birth weights are correlated with reduced survival in both males and females (22).
Detailed explanation-3: -Stabilizing selection occurs when the average/mean trait is selected for. In humans, babies with low or high birth weights have high mortality and so average birth weight is selected for because babies born at normal weights have a higher chance of surviving.
Detailed explanation-4: -Stabilizing selection: Stabilizing selection occurs when the population stabilizes on a particular trait value and genetic diversity decreases.