4.3 Genetic Diversity

• Genetic diversity refers to the variety of genes within a population of a species.


  True
• Arrange the sources of genetic diversity in the order they typically occur in a population:

  1️⃣ Genetic Recombination

  2️⃣ Mutation

  3️⃣ Gene Flow

  4️⃣ Genetic Drift
• Random changes in the DNA sequence introduce new genetic variations within a population through the process of mutation
• Gene flow involves the transfer of genes between different populations or species through interbreeding.


  True
• Genetic recombination creates new gene combinations in offspring by exchanging genetic material between parental chromosomes
• What is the primary effect of gene flow on genetic diversity?

  Introduces new genetic material
• How does genetic diversity contribute to adaptation in a population?

  Greater gene variety
• A diverse gene pool ensures that a population can withstand environmental stressors.

  True
• Greater gene variety allows the population to adapt to changing environments
• How does genetic diversity enhance disease resistance in a population?

  Broader range of genes
• Match the source of genetic diversity with its description.

  Genetic Recombination ↔️ Exchange of genetic material during sexual reproduction

  Mutation ↔️ Random changes in DNA sequences

  Gene Flow ↔️ Transfer of genes between populations

  Genetic Drift ↔️ Random fluctuations in allele frequencies
• Mutations always increase genetic diversity within a population.


  True
• Match the source of genetic variation with its impact.

  Mutations ↔️ Random alterations in DNA sequences

  Genetic Recombination ↔️ Exchange of genetic material during meiosis

  Gene Flow ↔️ Movement of genes between populations

  Genetic Drift ↔️ Random changes in allele frequencies
• Genetic bottlenecks can reduce genetic diversity by drastically reducing population size
• What is the primary definition of genetic diversity?

  Variety of genes within a population
• Populations with high genetic diversity are more resilient to environmental changes due to a wider range of traits
• Order the key sources of genetic diversity and their impact.

  1️⃣ Genetic Recombination: Creates new gene combinations

  2️⃣ Mutation: Introduces new genetic variations

  3️⃣ Gene Flow: Enhances genetic diversity between populations

  4️⃣ Genetic Drift: Can reduce genetic diversity in small populations
• During sexual reproduction, chromosomes exchange genetic material in a process called genetic recombination
• Genetic drift is most significant in populations that are small
• Match the source of genetic variation with its description:

  Mutations ↔️ Random alterations in DNA

  Genetic Recombination ↔️ Exchange of genetic material

  Gene Flow ↔️ Movement of genes between populations

  Genetic Drift ↔️ Random changes in allele frequencies
• Reproductive isolation leads to higher genetic diversity.

  False
• Genetic diversity is essential for a population's ability to adapt to changing environments.


  True
• Genetic diversity is essential for a population's ability to adapt to environmental changes and resist diseases
• Match the benefit of genetic diversity with its description:

  Adaptation ↔️ Greater gene variety allows adjustment to changing environments

  Disease Resistance ↔️ Broader range of genes can offer protection

  Overall Resilience ↔️ Ensures the population withstands stressors
• What is the process of genetic recombination during sexual reproduction?

  Exchange of genetic material
• In which type of population is genetic drift most significant?

  Small populations
• Mutations can occur during DNA replication or due to environmental factors.


  True
• Match the benefit of genetic diversity with its description:

  Adaptation ↔️ Greater gene variety allows adjustment to changing environments

  Survival ↔️ Higher chances of possessing suitable traits

  Overall Resilience ↔️ Ensures the population withstands stressors
• Why is genetic diversity crucial for a population's ability to adapt to changing environments?

  Greater gene variety
• Populations with higher genetic diversity have a better chance of survival in new conditions.


  True
• Order the main sources of genetic diversity within a population.

  1️⃣ Genetic Recombination

  2️⃣ Mutation

  3️⃣ Gene Flow

  4️⃣ Genetic Drift
• Why is genetic variation essential for evolution?

  Raw material for natural selection
• Genetic recombination occurs during meiosis
• How does population size affect genetic diversity?

  Larger populations maintain diversity
• Match the factor affecting genetic diversity with its impact.

  Population Size ↔️ Larger populations maintain genetic diversity

  Reproductive Isolation ↔️ Reduces genetic diversity due to less gene flow

  Selective Pressures ↔️ Eliminates less-fit genotypes

  Genetic Bottleneck ↔️ Reduces population size and genetic diversity
• Genetic diversity facilitates resilience to diseases and environmental changes.


  True
• Why are populations with low genetic diversity susceptible to widespread diseases?

  Limited adaptive potential
• Genetic drift always reduces genetic diversity within a population.

  False
• Mutations always increase genetic diversity within a population.


  True
• Genetic variation is the raw material for natural selection.


  True