7.5 Flashcards
1
Q
What is a chromosomal abnormality?
A
A chromosomal abnormality is a change in the normal structure or number of chromosomes, which can lead to genetic disorders.
2
Q
What is non-disjunction?
A
Non-disjunction is the failure of homologous chromosomes or sister chromatids to separate properly during cell division.
3
Q
Repeating a sequence (duplicating) in a chromosome
A
Duplication
4
Q
Having an extra chromosome
A
Trisomy
5
Q
Missing one chromosome
A
Monosomy
6
Q
What is the difference between a deletion and a duplication?
A
A deletion removes a segment of a chromosome, while a duplication repeats a segment.
7
Q
What is X-chromosome inactivation?
A
The two X chromosomes in a cell, one is inactivated due to only needing one of them to send proteins. The other becomes a Barr Body
8
Q
A
