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Evolution · Question 105

AIPMT 2002MCQEasy📈 Topic in 50% papers+4−1
1

Genetic drift operates in : -

  1. Slow reproductive population
  2. Small isolated population
  3. Large isolated population
  4. Fast reproductive population

Answer

(2) Small isolated population

Solution

Genetic drift is a change in allele frequency that occurs by chance.

As per NCERT, gene flow and genetic drift affect the Hardy–Weinberg equilibrium; when such a change occurs by chance it is called genetic drift.

∵ Chance effects are large only when the number of individuals is small (e.g., founder effect in a small isolated group), and are averaged out in large populations.

∴ Genetic drift operates in small isolated populations.

Answer: (2)

AIPMT 2002

Keep practising — Evolution

2

There is no life on moon due to the absence of -

  1. O2
  2. Light
  3. Water
  4. Temperature
AIPMT 2002
3

According to fossils which discovered up to present time, origin and evolution of man was started from

  1. Java
  2. Africa
  3. China
  4. France
AIPMT 2002
4

In which condition, the gene ratio remains constant for any species population ?

  1. Gene flow
  2. Mutation
  3. Sexual selection
  4. Random mating
AIPMT 2002
5

Sequence of which of the following is used to know the phylogeny ?

  1. DNA
  2. r-RNA
  3. m-RNA
  4. t-RNA
AIPMT 2002
6

In which era reptiles were dominant ?

  1. Archaeozoic era
  2. Mesozoic era
  3. Coenozoic era
  4. Paleozoic era
AIPMT 2002
7

Half life period of C14 is : -

  1. 5000 years
  2. 50 years
  3. 500 years
  4. 5 104 years
AIPMT 2001
8

Similarities in organism with different genotype indicates : -

  1. Divergent evolution
  2. Macroevolution
  3. Convergent evolution
  4. Microevolution
AIPMT 2001
9

Reason of diversity in living beings : -

  1. Mutation
  2. Short term evolutionary change
  3. Long term evolutionary change
  4. Gradual change
AIPMT 2001
10

Which of the following is closest relative of man ?

  1. Gorilla
  2. Chimpanzee
  3. Gibbon
  4. Orangutan
AIPMT 2001
11

Which of the following is correct order of the evolutionary history of man ?

  1. Peking man, Heidelberg man, Neanderthal man, Cro-Magnon man
  2. Peking man, Neanderthal man, Homo sapiens, Cro-Magnon man
  3. Peking man, Neanderthal man, Homo sapiens, Heidelberg man
  4. Peking man, Homo sapiens, Neanderthal man, Cro-Magnon man
AIPMT 2001

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