Unit 4: Mutations.ameoba video

What is a mutation in the context of genetics?

• A replication of DNA

• A type of genetic disorder

• A process of cell division

• A change of genetic material, specifically within a nucleic acid

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Which types of organisms can experience mutations?

• Only multicellular organisms

• Animals, plants, fungi, protists, bacteria, Archaea, and viruses

• Only bacteria and viruses

• Only animals and humans

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What can cause mutations to occur more frequently?

• Regular cell division

• Natural selection

• Excessive radiation or certain chemicals

• Healthy living conditions

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What is a frameshift mutation?

• A mutation where a base is substituted

• A mutation where a base is deleted or inserted, changing the reading frame

• A mutation where a chromosome is duplicated

• A mutation that does not affect the amino acid sequence

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What is the result of a silent mutation?

• It always results in a harmful effect

• It does not change the amino acid coded by a codon

• It prevents protein synthesis

• It changes the amino acid coded by a codon

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Which type of mutation is involved in sickle cell anemia?

• Deletion

• Frameshift

• Substitution

• Duplication

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What is the primary effect of nondisjunction during meiosis?

• It causes a frameshift mutation

• It leads to a silent mutation

• It enhances genetic variability

• It results in an incorrect number of chromosomes

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How can carriers of the sickle cell trait have a protective factor against malaria?

• Their red blood cells carry more oxygen

• They can't carry the malaria protist

• Their symptoms of malaria are often less severe

• They are immune to malaria

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What is the impact of a missense mutation in a gene?

• It does not affect the protein produced.

• It changes a single amino acid in the protein.

• It results in the premature termination of protein synthesis.

• It duplicates a segment of the DNA.

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How do environmental factors influence genetic mutations?

• They have no impact on mutations.

• They can increase the rate of mutation by introducing mutagens.

• They can correct mutations in DNA replication.

• They decrease genetic variability.

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