3.6 Mutations Lesson

Match type of DNA mutation on the left with the definition on the right.

Match type mutation on the left with the definition on the right.

A DNA strand contains the following nucleotide sequence:

TAC TTC GCG GAA ACT

Assume this DNA strand is then mutated. Which of the following mutated sequences represents a frameshift mutation in the mRNA?

A strand of DNA: TAC AAT TAG AGG TAA

*Mutation occurs during DNA replication*

Mutated strand: TAC ATT AGA GGT AA

Which of the following terms best describes the mutation?

A strand of DNA: TAC AAT TAG AGG TAA

*Mutation occurs during DNA replication*

Mutated strand: TAC AGA TTA GAG GTA A

Which of the following terms best describes the mutation?

A strand of DNA: TAC AAT TAG AGG TAA

*Mutation occurs during DNA replication*

Mutated strand: AAC AAT TAG AGG TAA

Which of the following terms best describes the mutation?

In this image, the top row of letters represent DNA codons and the amino acids that would be placed in a polypeptide if the DNA strand was transcribed and translated. The bottom row of letters represent the same DNA strand after a mutation has occurred, including the mutation's effect on the resulting amino acid sequence. The white arrow represents the mutation where G is removed. Which of the following terms best describes the mutation illustrated in the image?

A DNA strand contains the following nucleotide sequence:

TAC TTC GCG GAA ACT

Assume this DNA strand is then mutated. Which of the following mutated sequences represents a frameshift mutation?

In a multicellular organism, a mutation can only be passed from parent to child if it happens in the reproductive cells (sperm or egg). If the mutation is in other body cells (like skin or liver cells), it won’t be passed on to the offspring. Because only reproductive cells (sperm and egg) are used to make a baby. If a mutation is in one of those cells, it becomes part of the baby's DNA. But if the mutation is in other body cells (like skin or liver), it stays in that person and isn’t passed on.

In a multicellular organism, which of the following mutations is capable of being passed from parent to offspring?

A strand of DNA nucleotides contains the following base sequence:

TAC AAT TAG AGG TAA

After a mutation occurs, the strand contains this mutated base sequence:

TAC ATT AGA GGT AA

Which of the following terms best describes the mutation?

Mutations are done intentionally by the cell.

Point mutations are where _____ base(s) is changed.

Frameshift mutations occur when a base is added or removed, and then you ended up with an uneven amount of bases (as opposed to perfect groups of 3)

Missense mutations cause the protein to "stop" being made prematurely (too soon)

A missense mutation makes the same protein so it's not a noticeable mutation.