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Random genetic drift in a population probably results from

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Important Questions on Evolution

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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
In a population of plants, some were extremely tall and the remaining were extremely dwarf. No plants of the population showed intermediate height. The type of operation of natural selection in the above case is
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
Write salient features of Darwin's theory of Evolution
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
In a species, the weight of the newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 and 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?
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle

Study the following and pick up the correct combinations:

S.NO List -1 List-2 List -3
I. Anagenesis Divergent evolution One species diverges into two or more species
II. Cladogenesis Phyletic evolution Evolution of a new species in single lineage
III. Gradualism Charles Lyell Earth has changed slowly through ages
IV. Biogenesis Louis Pasteur Living organisms originate from preexisting forms
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by:
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle

Statement I: The existence of deleterious genes within the populations is called genetic load.
Statement II: The changes in the frequency of a gene that occurs merely by chance in small populations is called genetic drift.

The correct option among the following is

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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
In a population of 1000 individuals 360 belong to genotype AA, 480 to Aa, and the remaining 160 to aa, Based on this data, the frequency of allele A in the population is:
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
In a population, NAA and Naa are the numbers of homozygous individuals of allele 'A' and 'a', respectively and NAa is the number of heterozygous individuals. Which one of the following options is the allele frequency of 'A' and 'a' in a population with NAA=90, NAa=40 and Naa=70?
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
In a large isolated population, alleles p and q at a locus are at Hardy Weinberg equilibrium. The frequencies are p=0.6 and q=0.4 . The proportion of the heterozygous genotype in the population is
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
Artificial selection to obtain cows yielding higher milk output represents
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
Assertion (A): Founder effect is a type of genetic drift
Reason (R): The change in the frequency of a gene that occurs merely by chance and not by selection, in very large population, is called genetic drift
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
A population will not exist in Hardy-Weinberg equilibrium if:
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
Which one of the following factors is not included in the 'Modern Synthetic theory' of evolution?
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
Industrial melanism is an example of:
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
In a population of 1600 individuals, 570 have the genotype AA, 75 have Aa and remaining 280 have aa; find out the allelic frequency of alleles A and a
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
The allele frequency of A'' and a'' in a population are 0.6 and 0.4 respectively. The expected frequency of heterozygous individuals is
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
The bill sizes in a bird species of seed crackers from West Africa shows a bimodal distribution. Their most abundant food sources are two types of marsh plants that produce hard and soft seeds, consumed preferentially by the large and small billed birds, respectively. This bimodal distribution of bill sizes is a likely consequence of
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the Population?
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
Genetic drift
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Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle
Natural selection means