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#bimodal distribution

2 public questions tagged with this topic.

ORIGIN OF LIFE

Increase in variance with two peaks indicates:

Disruptive selection reflects key principle in quiz on pyqs-evo theories + genetic drift, where evolutionary mechanisms shape genetic variation and adaptation. In this context, Disruptive selection aligns with experimental and theoretical evidence from population genetics, behavioral ecology and molecular phylogeny. Textbooks like Campbell Biology, Futuyma Evolution and Hartl Principles illustrate supporting data. Understanding why Disruptive selection fits helps integrate natural selection, environment.

Ref: Hartl & Clark, Principles of Population Genetics, Drift and Effective Size.

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NATURAL SELECTION

Disruptive selection results in

Disruptive or diversifying selection favors both extremes over intermediate, increasing variance and potentially creating bimodal distribution. Example finches specializing on large and small seeds when intermediate seeds scarce. If hybrids have low fitness, reproductive isolation may evolve promoting sympatric divergence. This maintains polymorphism and can lead to adaptive radiation. Hence Bimodal distribution are favored, opposite to stabilizing selection maintaining mean. This concept integrates genetics, ecology and molecular evidence, frequently tested in NEET, GATE and CSIR-NET, highlig

Ref: Futuyma, Evolution, 4th ed., Chapter 11: Natural Selection.

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