Class 10 Practice - Level 3 - Heredity And Evolution - Set 2

Total questions: 15

In a polygenic inheritance pattern, if three genes (A, B, and C) each with two alleles contribute additively to the trait of height in plants, how many different phenotypic classes can be observed in the offspring?

Topic: Heredity

None

Which type of selection is most likely to result in speciation?

Topic: Evolution

Stabilizing selection

Directional selection

Disruptive selection

Artificial selection

None

What is the significance of the Luria-Delbrück experiment in understanding bacterial genetics?

Topic: Heredity

It demonstrated that mutations occur as a response to environmental changes.

It showed that mutations in bacteria occur randomly and are not induced by selection.

It proved the concept of genetic recombination in bacteria.

It established the principles of horizontal gene transfer.

None

Which of the following best describes the Red Queen Hypothesis?

Topic: Evolution

Species must constantly adapt and evolve to survive while pitted against ever-evolving opposing species.

Species evolve due to random genetic drift and not because of natural selection.

Evolutionary change occurs in rapid bursts followed by long periods of stability.

Species remain genetically static until environmental changes force adaptation.

None

In the context of epigenetics, what is the primary role of histone modification?

Topic: Heredity

To alter the DNA sequence of genes

To influence gene expression by changing chromatin structure

To repair damaged DNA

To promote RNA splicing

None

Which of the following processes is most likely to increase the genetic variation within a population?

Topic: Evolution

Genetic drift

Inbreeding

Gene flow

Founder effect

None

What is the purpose of a complementation test in genetics?

Topic: Heredity

To determine the DNA sequence of a gene

To measure the expression levels of a gene

To identify whether two mutations are in the same or different genes

To amplify a specific segment of DNA

None

Which of the following is an example of a prezygotic isolating mechanism?

Topic: Evolution

Reduced hybrid fertility

Temporal isolation

Hybrid inviability

Hybrid breakdown

None

What is a genetic bottleneck, and how does it affect populations?

Topic: Heredity

A rapid increase in population size, leading to high genetic diversity

A severe reduction in population size, leading to loss of genetic diversity

The introduction of new alleles into a population, increasing genetic variation

The equilibrium state of allele frequencies in a large population

None

10.

Which concept describes the ability of a single gene to affect multiple phenotypic traits?

Topic: Evolution

Epistasis

Pleiotropy

Polygenic inheritance

Codominance

None

11.

In a population with Hardy-Weinberg equilibrium, the frequency of the dominant allele (A) is 0.6. What is the expected frequency of the heterozygous genotype (Aa)?

Topic: Heredity

0.16

0.24

0.36

0.48

None

12.

Which of the following best describes the founder effect?

Topic: Evolution

The random loss of alleles in a small population due to genetic drift

The movement of individuals between populations, causing gene flow

The establishment of a new population by a small number of individuals, leading to reduced genetic diversity

The rapid evolution of a population in response to a sudden environmental change

None

13.

What is the function of a promoter region in a gene?

Topic: Heredity

It encodes the protein sequence.

It initiates the transcription of the gene.

It terminates the transcription of the gene.

It splices the RNA transcript.

None

14.

Which of the following is an example of adaptive radiation?

Topic: Evolution

The development of antibiotic resistance in bacteria

The evolution of different beak shapes in Darwin's finches

The convergence of body shapes in dolphins and sharks

The reduction in genetic diversity due to a population bottleneck

None

15.

Which of the following best describes the role of a spliceosome?

Topic: Heredity

It initiates DNA replication.

It synthesizes proteins.

It removes introns from pre-mRNA.

It facilitates chromosomal crossover.

None

1 out of 15

Time's up

Class 10 Practice - Level 3 - Heredity And Evolution - Set 2

Welcome back