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NEET BIOLOGYEvolutionEasy

Question

Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as:

A

Genetic drift

B

Random mating

C

Genetic load

D

Genetic flow

Step-by-Step Solution

while factors like gene migration (gene flow) involve the movement of populations, if the change in allele frequency occurs simply by chance, it is called genetic drift. Sometimes, this change is so drastic in a new sample of a population that they become a different species (founder effect).

Exam Context & Concepts Covered

This question aligns with the NEET BIOLOGY syllabus, specifically targeting concepts from Evolution. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

BIOLOGYEvolutionvariationfrequencieswithinpopulationschance

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Given below are some stages of human evolution. Arrange them in the correct sequence (Past to Recent): A. Homo habilis B. Homo sapiens C. Homo neanderthalensis D. Homo erectus

A.A → D → C → B
B.D → A → C → B
C.A → C → D → B
D.D → C → A → B
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A.I, II, III, IV
B.I, III, II, IV
C.II, III, I, IV
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Among the human ancestors the brain size was more than 1000 cc in:

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Forelimbs of cat, lizard used in walking; forelimbs of whale used in swimming and forelimbs of bats used in flying are an example of:

A.Analogous organs
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Panspermia, an idea that is still a favorite for some astronomers, means:

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A.Adaptive Radiation
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