does not affect Hardy-Weinberg equilibrium

do not change the frequency of genes and alleles in future generation

slows down the formation of reproductive population

HARD

Earn 100

In a population, $N_{A A}$ and $N_{a a}$ are the numbers of homozygous individuals of allele ' $A$ ' and ' $a$ ', respectively and $N_{A a}$ is the number of heterozygous individuals. Which one of the following options is the allele frequency of ' $A$ ' and ' $a$ ' in a population with $N_{A A} = 90, N_{A a} = 40$ and $N_{a a} = 70 ?$

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Important Questions on Evolution

HARD

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

MEDIUM

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?

MEDIUM

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

MEDIUM

Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle

In a population of

1600

individuals,

570

have the genotype

A A, 75

have Aa and remaining

280

have aa; find out the allelic frequency of alleles A and a

HARD

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 a n d q = 0.4

. The proportion of the heterozygous genotype in the population is

MEDIUM

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?

EASY

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

MEDIUM

Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle

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:

HARD

Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle

Artificial selection to obtain cows yielding higher milk output represents

HARD

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?

EASY

Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle

Industrial melanism is an example of:

EASY

Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle

Genetic drift

MEDIUM

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

MEDIUM

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

MEDIUM

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

EASY

Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle

Which one of the following is an essential condition for a population to be at Hardy-Weinberg equilibrium?

EASY

Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle

The factor that leads to Founder effect in population is:

HARD

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:

EASY

Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle

In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by:

EASY

Biology>Genetics and Evolution>Evolution>Hardy Weinberg's Principle

A population will not exist in Hardy-Weinberg equilibrium if:

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?

Important Questions on Evolution

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