DNA and Mutations Flashcards
1
Q
Define a mutation?
A
Permanent changes in the genetic material.
2
Q
Are all mutations inheritable?
A
Yes. They are copied during replication and passed down to daughter cells.
3
Q
Not all mutations are passed down to future generations EXCEPT
A
Germ line mutations, a mutation in the sex cells.
4
Q
What is a somatic cell mutation?
A
Occurs in the body cells, key cause for cancer.
5
Q
Define Crossing Over
A
Recombines genetic material onto different chromosomes.
6
Q
Define Nondijunction
A
Failure of homogenlous chromsome pairs to separate during meiosis.
7
Q
What is a gene mutation?
A
A change in the sequence of nucleotides.
8
Q
Define subsitituion
A
The changing of one base pair to another.
