cell division Flashcards
what is produced in mitosis
2 daughter cells
mitosis timeline
- cell begins to divide
- dna replicates (2 copies of each chromosome )
3.one set of chromosomes is pulled to each end of cell and nucleas divides
haploid
23 chromosomes
diploid
46 chromosomes
stem cell
undifferentiated cells that can differentiate in to one or more specialised cells
where are adult stem cells found
bone marrow
what are embryonic stem cells
undifferentiated stem cells from embryos that can differentiate into any cell
what is therapeutic cloning?
patients cells are used to create an early embryo clone of themselves
advantage of therapeutic cloning
stem cells from embryos will not be rejected
advantage of using adult stem cells
fewer ethical issues as adults can consent
disadvantages of using adult stem cells
can treat fewer diseases as they cannot differentiate into any cell
advantage of using embryonic stem cells
can be used to treat many diseases
easier to obtain
what is cell division by mitosis
body cells divide to form two identical daughter cells
what is the purpose of mitosis?
growth repair of cells and asexual production
what is plant meristem
where rapid cell division occurs in the tips of the roots of a plant