Meiosis Flashcards
1
Q
Meiosis has how many cell divisions?
A
Two (2)
2
Q
Crossing over
A
A piece of one chromosome is exchanged with a piece of another chromosome (occurs during prophase I)
3
Q
Recombinant Chromosomes
A
Altered genes from parents
4
Q
Meiosis results in…
A
Four (4), genetically unique, haploid cells (23 chromosomes each)
5
Q
Nondisjunction
A
- During anaphase I: homologous pairs do not separate
- During anaphase II: sister chromatids do not separate
6
Q
Down’s Syndrome
A
Extra chromosome on 21st chromosome pair
7
Q
Turner Syndrome
A
X0
Female, infertile, reduced stature
8
Q
Klinefelter Syndrome
A
XXY
Typically male, limited testosterone, often sterile
9
Q
Triple-X Syndrome
A
XXX
Female; fertile but occasional learning disabilities
10
Q
Jacob’s Syndrome
A
XYY
Male; often taller, lower than normal intelligence
11
Q
Alleles
A
Different versions of homologous genes
