11.2 cell division Flashcards
1
Q
define mitosis
A
nuclear division giving rise to genetically identical cells
2
Q
when does the exact duplication of choromosomes accur?
A
before mitosis
3
Q
What is the role of mitosis? [4]
A
-growth
-repair of damaged tissue
-replacement of cells
-asexual reproduction
4
Q
Define meiosis
A
reduction division in which the chromosome number is halved from diploid to haploid resulting in genetically different cells
5
Q
what is meiosis involved with?
A
production of gametes
6
Q
what are stem cells?
A
-unspecialised cells
-produce specialised cells by mitosis
-in embryos allow to grow and develop
-in adults replace damaged cells
