ch 13 Flashcards
1
Q
genes
A
units of heredity
2
Q
locus
A
a gene’s location on a chromsome
3
Q
Mitosis
A
cell division resulting in 2 daughter cells identical to parent cell
4
Q
mitosis is responsible for
A
asexual reproduction
5
Q
mitosis function is
A
repair, and maintenance
6
Q
Meiosis
A
cell division resulting in haploid gametes
7
Q
haploid gametes are
A
sex cells
8
Q
Meiosis is responsible for
A
sexual reproduction
9
Q
meiosis function is
A
gamete formation
10
Q
meiosis function is
A
genetic variablity
11
Q
diploid chromosome number
A
46
12
Q
one set from father and one set from mother, how many from each?
A
23
13
Q
sexual reproduction involves
A
- meiosis
- gamete production
- fertilization
14
Q
sexual reproduction produces
A
genetic variation among offspring
15
Q
Stages in Meiosis I
A
- prophase I
- metaphase I
- anaphase I
- telophase I
16
Q
Prophase I
A
- each duplicated chromosomes pair with it homologue
-homogues swap segemnts - each chromosome becomes attached to microtubles
17
Q
when crossing over in prophase 1
A
- four chromatic are aligned
- non sister chromosomes exchange segments
- new allele combinations created
18
Q
Metaphase I
A
- chromosomes are pulled into middle of cell
-spindle is fully formed - sister chromatids form toward one pole and others to opposite pole
19
Q
Anaphase I
A
- homologous chromosomes separate from each other
- sister chromatids remain attached
20
Q
Telophase I
A
- chrome are at opposite poles
- cytoplasm divides
- there are 2 haploid cells
-meiosos I is completed
21
Q
Prophase II
A
- microtubles attached to depilated chromosomes
- motor proteins drive chromosomes towards the middle of spindle
22
Q
Metaphase II
A
- all duplicated chromosomes are at the spindles equator between the poles
23
Q
Anaphase II
A
- sister chromatids separate and become independent chromosomes
- motor proteins move separated chromosomes to opposite poles
24
Q
Telophase II
A
25
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28
29
30
31
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