Which of the following best defines a mutation in the context of nucleic acids?

A change in the sequence of nucleotide bases in DNA or RNA.

Why are insertions and deletions considered potentially more dangerous than substitutions in gene mutations?

Insertions and deletions can cause frameshift mutations, altering the reading frame of codons and affecting all subsequent amino acids.

Describe what a frameshift mutation is and how it can affect the resulting protein.

A frameshift mutation occurs when a base is inserted or deleted, altering the reading frame of codons. This can lead to many amino acid changes in the resulting protein.

Explain the difference between gene mutations and chromosomal mutations.

Gene mutations involve changes in one or more DNA bases within a gene, while chromosomal mutations involve changes in the structure or number of chromosomes.

What is nondisjunction, and how can it lead to mutations?

Nondisjunction is the failure of chromosomes to separate properly during meiosis, resulting in egg or sperm cells with too many or too few chromosomes.

DNA Changes and Cancer

Grade 9th Grade · Science · 45 min

What's Included

Learning Objective

I can describe how changes in DNA can lead to cancer.

Warm-Up Video

Amoeba Sisters · 7:14

Mutations (Updated)

Guided Notes

3 key concepts

1
A mutation is a change in genetic material, specifically within a nucleic acid like RNA or DNA.
2
Gene mutations include substitution, insertion, and deletion, with insertions and deletions potentially causing a frameshift mutation.
3
Chromosomal mutations include duplication, deletion, inversion, and translocation, which can occur during meiosis due to nondisjunction.

Practice Questions

9 questions · Multiple choice & Short answer

Exit Ticket

Quick comprehension check

“Describe one way that a mutation in DNA could potentially lead to cancer.”

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DNA Changes and Cancer

What's Included

Learning Objective

Warm-Up Video

Guided Notes

Practice Questions

Exit Ticket

Complete Lesson Package

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