Biology

Genetics and Evolutionary Biology

1,123 Questions

Genetics and evolutionary biology explain how traits are passed from parents to offspring and how species change over time. Key concepts include genetic drift, inbreeding, and heredity. This topic is fundamental for the biology section of many competitive tests.

Heredity and traitsGenetic variations and driftInbreeding conceptsEvolutionary mechanisms

Genetics and Evolutionary Biology Questions

Multiple choice

Which of the following is NOT a potential risk of hybridization?

  1. Loss of genetic diversity

  2. Reduced fitness

  3. Increased susceptibility to disease

  4. Outbreeding depression
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hybridization can lead to loss of genetic diversity, reduced fitness, or increased susceptibility to disease, but it does not typically lead to outbreeding depression.

Multiple choice

What is the term for the reduced fitness of hybrids compared to their parents?

  1. Hybridization

  2. Introgression

  3. Speciation

  4. Outbreeding depression
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Outbreeding depression is the reduced fitness of hybrids compared to their parents.

Multiple choice

Which of the following is NOT a factor that can influence the success of hybridization?

  1. Genetic distance between the parent species

  2. Ecological similarity between the parent species

  3. Geographic isolation of the parent species

  4. Hybridization history of the parent species
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The genetic distance between the parent species, the ecological similarity between the parent species, and the geographic isolation of the parent species can all influence the success of hybridization, but the hybridization history of the parent species is not typically a factor.

Multiple choice

Which of the following is NOT a potential consequence of hybridization?

  1. Increased genetic diversity

  2. Increased fitness

  3. Reduced fertility

  4. Extinction
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hybridization can lead to increased genetic diversity, increased fitness, or reduced fertility, but it does not typically lead to extinction.

Multiple choice

What is the term for the process by which genes from a hybrid population are transferred back to one of its parent species?

  1. Hybridization

  2. Introgression

  3. Speciation

  4. Convergence
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Introgression is the process by which genes from a hybrid population are transferred back to one of its parent species.

Multiple choice

Which of the following is NOT a factor that can influence the direction of introgression?

  1. The relative fitness of the hybrid population

  2. The relative abundance of the parent species

  3. The geographic isolation of the hybrid population

  4. The hybridization history of the parent species
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The relative fitness of the hybrid population, the relative abundance of the parent species, and the geographic isolation of the hybrid population can all influence the direction of introgression, but the hybridization history of the parent species is not typically a factor.

Multiple choice

What is the term for the process by which two species become so different that they can no longer interbreed?

  1. Hybridization

  2. Introgression

  3. Speciation

  4. Convergence
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Speciation is the process by which two species become so different that they can no longer interbreed.

Multiple choice

Which mathematical model is used to describe the evolution of cancer cells under the influence of targeted therapy?

  1. Mutation-selection model

  2. Adaptive therapy model

  3. Resistance model

  4. Combined model
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A combined model is used to describe the evolution of cancer cells under the influence of targeted therapy. This model takes into account the mutation-selection model, the adaptive therapy model, and the resistance model.

Multiple choice

Which of the following is NOT a genetic theory of aging?

  1. The accumulation of genetic mutations

  2. The shortening of telomeres

  3. The loss of genetic diversity

  4. The activation of aging-related genes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The shortening of telomeres is not a genetic theory of aging. It is a biological process that is associated with aging, but it is not caused by genetic mutations.

Multiple choice

According to the genetic theory of aging, what causes aging?

  1. The accumulation of free radicals in the body

  2. The breakdown of telomeres

  3. The accumulation of genetic mutations

  4. The loss of muscle mass
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The genetic theory of aging proposes that aging is caused by the accumulation of genetic mutations. These mutations can damage genes and proteins, and they can lead to the development of age-related diseases.

Multiple choice

Why is genetic diversity important in crops?

  1. It increases crop yield

  2. It makes crops more resistant to pests and diseases

  3. It allows farmers to adapt to changing environmental conditions

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Genetic diversity is essential for the long-term sustainability of agriculture. It provides a buffer against pests and diseases, allows farmers to adapt to changing environmental conditions, and can help to increase crop yields.

Multiple choice

What is the term for the loss of genetic diversity within a population?

  1. Genetic erosion

  2. Inbreeding

  3. Outbreeding

  4. Hybridization
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Genetic erosion is the loss of genetic diversity within a population. This can occur due to a number of factors, including habitat loss, fragmentation, and selective breeding.

Multiple choice

What is the term used to describe the process by which isolated populations of a species become genetically distinct from each other?

  1. Genetic drift

  2. Natural selection

  3. Gene flow

  4. Founder effect
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The founder effect occurs when a small group of individuals becomes isolated from the main population and establishes a new population. This can lead to genetic differences between the isolated population and the original population.

Multiple choice

What is the term used to describe the process by which habitat loss and fragmentation reduce the genetic diversity of a population?

  1. Genetic drift

  2. Natural selection

  3. Gene flow

  4. Founder effect
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Genetic drift is the random fluctuation of gene frequencies in a population. It can occur due to a number of factors, including habitat loss and fragmentation, which can reduce the size of a population and increase the likelihood of genetic drift.

Multiple choice

What is inbreeding?

  1. Mating between closely related individuals

  2. Mating between individuals from different populations

  3. Mating between individuals of the same species

  4. Mating between individuals of different species
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Inbreeding is the mating of closely related individuals, such as siblings or parents and offspring.