17-25 Flashcards
1
Q
Extra chromosome present
A
Trisomy
2
Q
One chromosome missing
A
Monosomy
3
Q
Abnormalities in chromosome number may originate during
A
Meiotic and mitotic division
4
Q
Separation does not occur
A
Nondisjunction
5
Q
Why one cell receives 24 and another 22 chromosomes
A
During meiotic division separation don’t occur this both members of a pair move into one cell
6
Q
Nondisjunction occurs during
A
Either the first or the second meiotic division
7
Q
Down syndrome is caused by
A
An extra copy of chromosome 21
