10.4 Flashcards
(4 cards)
1
Q
What are the definitions of Trisomy, monosomy, barr body, Autosome, and sex chromosome.
A
Trisomy: diploid cells have three copies of one chromosome type.
monosomy: diploid cells have only one copy of a chromosome type.
Autosome: Nots a sex chromosome
sex chromasome: determines what the sex of a organism will be.
Barr body: Randomly selects a x chromosome to inactivate.
2
Q
When can nondisjunction happen.
A
When homologous pairs in meiosis 1 or sister chromosomes in meiosis 2 fail to seperate
3
Q
What determines human biological sex at birth
A
If there is a y chromosome then there will be a male but if it is only x chromosome then it will be a female.
4
Q
A
