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What is the meaning of phyletic evolution?

Important Questions on Organic Evolution

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Biology>Genetics and Evolution>Organic Evolution>Mechanism of Evolution
Genetic drift
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Biology>Genetics and Evolution>Organic Evolution>Mechanism of Evolution
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>Organic Evolution>Mechanism of Evolution
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>Organic Evolution>Mechanism of Evolution
Discuss the role of different patterns, of selections in evolution.
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Biology>Genetics and Evolution>Organic Evolution>Mechanism of Evolution

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>Organic Evolution>Mechanism of Evolution
In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by:
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Biology>Genetics and Evolution>Organic Evolution>Mechanism of Evolution
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>Organic Evolution>Mechanism of Evolution
In a diploid population at Hardy-Weinberg equilibrium, consider a locus with two alleles. The frequencies of these two alleles are denoted by p and q, respectively. Heterozygosity in this population is maximum at:
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Biology>Genetics and Evolution>Organic Evolution>Mechanism of Evolution
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>Organic Evolution>Mechanism of Evolution
Which one of the following factors is not included in the 'Modern Synthetic theory' of evolution?
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Biology>Genetics and Evolution>Organic Evolution>Mechanism of Evolution
A population will not exist in Hardy-Weinberg equilibrium if:
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Biology>Genetics and Evolution>Organic Evolution>Mechanism of Evolution
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>Organic Evolution>Mechanism of Evolution
The survivors of original population from natural calamities might be genetically different from their ancestors. This kind of evolutionary force is known as
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Biology>Genetics and Evolution>Organic Evolution>Mechanism of Evolution
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>Organic Evolution>Mechanism of Evolution
Artificial selection to obtain cows yielding higher milk output represents
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Biology>Genetics and Evolution>Organic Evolution>Mechanism of Evolution
If the percentage of heterozygotes in a population is 42%, what is the frequency of the recessive allele in that population?
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Biology>Genetics and Evolution>Organic Evolution>Mechanism of Evolution
All the following statements are correct about ‘Genetic Drift’, but one is wrong. Which one is wrong?
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Biology>Genetics and Evolution>Organic Evolution>Mechanism of Evolution
The chance of elimination of genes from a small population is an example of
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Biology>Genetics and Evolution>Organic Evolution>Mechanism of Evolution
For the MN-blood group system, the frequencies of M and N alleles are 0.7 and 0.3, respectively The expected frequency of MN-blood group bearing organisms is likely to be
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Biology>Genetics and Evolution>Organic Evolution>Mechanism of Evolution
Frequency of an allele in an isolated population may change due to