Reproduction/Genetics Flashcards
0
Q
How many chromosomes are in a germ cell?
A
23
1
Q
DNA
A
DNA= library, holds all info Chromosomes= bookshelf, hold some info Gene= book, holds specific info
2
Q
How many chromosomes are in a somatic cell?
A
46
3
Q
Male sex cell
A
XY
4
Q
Female sex cell
A
XX
5
Q
Three reasons for cell division
A
Development: assigning jobs
Repair: healing body
Growth: growing and adjusting
6
Q
Why does DNA double in interphase of cell cycle?
A
Because it has to create 2 daughter cells that are identical to the patent cell. If it did not double it would create 2 gametes, not somatic body cells.
7
Q
Mitosis
A
Results in 2 genetically identical body cells
8
Q
Meiosis
A
Results in 4 genetically different gametes- produces sex cells
9
Q
Diploid cell
A
Any cell that contains full (2 sites) of chromosomes (somatic cells)
10
Q
Haploid cell
A
Contains a half the usual number of chromosomes (sex cell)
