Mutations

Question 0

What is the difference between chromosome mutations and DNA mutations?

Answer 0

Chromosome mutations involve changes to parts of or whole chromosomes
DNA mutations are changes to genes due to changes in nucleotide base sequences.

Question 1

Define a mutation

Answer 1

A change in the amount of, or arrangement of the genetic material in a cell

Question 2

What are some examples of mutagens?

Answer 2

Tar, uv light, x rays and gamma rays

Question 3

What are the 2 classes of DNA mutations?

Answer 3

Point mutations where base pairs are substituted for others.
Insertion/deletion mutations where one or more nucleotide pairs are inserted or deleted from a length of DNA. These cause a frame shift

Question 4

What is an allele?

Answer 4

An alternate version of a gene. It still has the same locus on the chromosome and codes for the same polypeptide but the alteration to the DNA base sequence may alter the protein’s structure.