Topic: Darwin and modern synthetic theory· Genetics and Evolution

In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taki…

In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taking place ?

1. Directional Selection

2. Stabilizing Selection

3. Disruptive Selection

4. Cyclical Selection

Doubtly Asked 30 Oct 2026 NEET UG 2019 Practice test neet Save WhatsApp Report

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Answer: 2. Stabilizing Selection

Here the average-weight babies survive and both extremes (very light and very heavy) die. Selection favours the mean and removes both extremes. This is stabilising selection, so the curve becomes narrower.

Directional selection favours one extreme, and disruptive selection favours both extremes. Option 2 is correct.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taki…

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