10.4 Flashcards
1
Q
Nondisjunction
A
When chromosomes fail to seperate properly
2
Q
Trisomy
A
2n + 1
3
Q
Monosomy
A
2n - 1
4
Q
Autosomes
A
Any chromosome that’s not a sex chromosome
5
Q
Sex chromosomes
A
Gender, X & Y
6
Q
Barr Body
A
An inactive X chromosome
7
Q
Deletion
A
When part of a DNA molecule doesn’t get replicated properly or at all
8
Q
Duplication
A
When a part of a DNA molecule gets copied more than once
9
Q
Inversion
A
When a part of a chromosome reverses order
10
Q
Translocation
A
When one chromosome gets copied and takes the place of another, different chromosome.
11
Q
How does nondisjunction lead to mutation?
A
It could lead to one cell having too many chromosomes (trisomy) or one or no chromosomes (monosomy)
12
Q
What determines a human’s gender
A
The presence of the Y chromosome
13
Q
A
