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

What is the term used to describe the loss of genetic diversity within a population or species, often due to factors such as habitat loss and fragmentation?

  1. Genetic Drift

  2. Genetic Diversity

  3. Genetic Engineering

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

Genetic drift is the random fluctuation of gene frequencies in a population, often due to factors such as habitat loss and fragmentation, which can lead to the loss of genetic diversity and an increased risk of extinction.

Multiple choice

What is the term for the random change in the DNA sequence of an organism?

  1. Mutation

  2. Recombination

  3. Gene duplication

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

Mutation is the random change in the DNA sequence of an organism. It can be caused by a variety of factors, such as exposure to radiation or chemicals, or errors in DNA replication.

Multiple choice

Which of the following is not a source of genetic variation?

  1. Mutation

  2. Recombination

  3. Gene flow

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

Natural selection is not a source of genetic variation. It is the process by which organisms with certain traits are more likely to survive and reproduce than organisms with other traits. This can lead to changes in the frequency of certain alleles in a population, but it does not create new alleles.

Multiple choice

What is the term for the transfer of genetic material from one organism to another?

  1. Mutation

  2. Recombination

  3. Gene flow

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

Gene flow is the transfer of genetic material from one organism to another. It can occur through a variety of mechanisms, such as pollination, seed dispersal, and animal migration.

Multiple choice

Which of the following is not a type of genetic variation?

  1. Single nucleotide polymorphism (SNP)

  2. Insertion/deletion polymorphism (InDel)

  3. Copy number variation (CNV)

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

Epigenetic variation is not a type of genetic variation. It is a type of heritable change in gene expression that does not involve changes in the DNA sequence.

Multiple choice

What is the term for the random change in the frequency of alleles in a population?

  1. Mutation

  2. Recombination

  3. Gene flow

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

Genetic drift is the random change in the frequency of alleles in a population. It can occur due to a variety of factors, such as natural disasters, population bottlenecks, and founder effects.

Multiple choice

Which of the following is not a cause of genetic variation?

  1. Mutation

  2. Recombination

  3. Gene flow

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

Genetic engineering is not a cause of genetic variation in natural populations. It is a human-directed process that involves the modification of an organism's genome.

Multiple choice

Which of the following is not a benefit of genetic variation?

  1. It allows populations to adapt to changing environmental conditions.

  2. It increases the resistance of populations to disease.

  3. It makes populations more vulnerable to extinction.

  4. It increases the overall fitness of populations.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Genetic variation is essential for the survival of populations. It allows populations to adapt to changing environmental conditions, increases their resistance to disease, and increases their overall fitness. However, it does not make populations more vulnerable to extinction.

Multiple choice

What is the term for the process by which new alleles are created?

  1. Mutation

  2. Recombination

  3. Gene flow

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

Mutation is the process by which new alleles are created. It can occur through a variety of mechanisms, such as exposure to radiation or chemicals, or errors in DNA replication.

Multiple choice

Which of the following is not a type of mutation?

  1. Single nucleotide polymorphism (SNP)

  2. Insertion/deletion polymorphism (InDel)

  3. Copy number variation (CNV)

  4. Transposable element insertion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Transposable element insertion is not a type of mutation. Transposable elements are pieces of DNA that can move around the genome. They can insert themselves into genes and cause mutations, but they are not themselves mutations.

Multiple choice

What is the term for the process by which genetic material is transferred from one generation to the next?

  1. Mutation

  2. Recombination

  3. Gene flow

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

Heredity is the process by which genetic material is transferred from one generation to the next. It occurs through the transmission of chromosomes from parents to offspring.

Multiple choice

Which of the following is not a factor that can affect the rate of genetic variation in a population?

  1. Population size

  2. Mutation rate

  3. Gene flow

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

Natural selection is not a factor that can affect the rate of genetic variation in a population. It is the process by which organisms with certain traits are more likely to survive and reproduce than organisms with other traits. This can lead to changes in the frequency of certain alleles in a population, but it does not affect the rate at which new alleles are created.

Multiple choice

What is the term for the process by which genetic material is lost from a population?

  1. Mutation

  2. Recombination

  3. Gene flow

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

Genetic drift is the process by which genetic material is lost from a population. It can occur due to a variety of factors, such as natural disasters, population bottlenecks, and founder effects.

Multiple choice

Which of the following is not a benefit of genetic variation for evolution?

  1. It allows populations to adapt to changing environmental conditions.

  2. It increases the resistance of populations to disease.

  3. It makes populations more vulnerable to extinction.

  4. It increases the overall fitness of populations.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Genetic variation is essential for the survival of populations. It allows populations to adapt to changing environmental conditions, increases their resistance to disease, and increases their overall fitness. However, it does not make populations more vulnerable to extinction.

Multiple choice

What is the term for the process by which genetic material is duplicated?

  1. Mutation

  2. Recombination

  3. Gene duplication

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

Gene duplication is the process by which genetic material is duplicated. It can occur through a variety of mechanisms, such as unequal crossing-over during meiosis or retrotransposition.