Genetic Variation Flashcards

1
Q

What is genetic variation?

A

Genetic variation refers to the differences in DNA sequences among individuals within a population.

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2
Q

True or False: Genetic variation is essential for evolution.

A

True

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3
Q

Name one source of genetic variation.

A

Mutations

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4
Q

Fill in the blank: Genetic variation can arise from ________ and sexual reproduction.

A

mutations

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5
Q

What is the role of mutations in genetic variation?

A

Mutations create new alleles, contributing to genetic diversity.

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6
Q

True or False: All genetic variations are beneficial.

A

False

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7
Q

What is an example of a harmful genetic variation?

A

Sickle cell disease

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8
Q

List one advantage of genetic variation.

A

Increased adaptability to environmental changes

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9
Q

What is the disadvantage of low genetic variation?

A

Increased vulnerability to diseases

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10
Q

True or False: Genetic variation can be influenced by environmental factors.

A

True

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11
Q

What is a polygenic trait?

A

A trait that is influenced by multiple genes.

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12
Q

Provide an example of a polygenic trait.

A

Human height

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13
Q

What is the significance of genetic variation in agriculture?

A

It allows for the development of crops that are resistant to pests and diseases.

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14
Q

Fill in the blank: Genetic variation helps populations to ________ over time.

A

adapt

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15
Q

What is one con of genetic engineering related to genetic variation?

A

It may reduce natural genetic diversity.

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16
Q

Define allele frequency.

A

The proportion of a specific allele among all allele copies in a population.

17
Q

True or False: Genetic drift can lead to changes in allele frequencies.

18
Q

What is the founder effect?

A

A decrease in genetic variation that occurs when a small group establishes a new population.

19
Q

Name a benefit of genetic variation in wildlife.

A

Greater resilience to environmental changes.

20
Q

What is the impact of inbreeding on genetic variation?

A

Inbreeding decreases genetic variation and can lead to health problems.

21
Q

Fill in the blank: Genetic variation is crucial for ________ selection.

22
Q

What is a genetic bottleneck?

A

A sharp reduction in the size of a population due to environmental events or human activities.

23
Q

True or False: Genetic variation can be beneficial for conservation efforts.

24
Q

What is the difference between genotype and phenotype?

A

Genotype refers to the genetic makeup, while phenotype is the observable characteristics.

25
Q

What is one way to increase genetic variation in a population?

A

Introducing individuals from different populations.

26
Q

True or False: Genetic variation is the same as genetic diversity.