mitosis

Question 1

what is mitosis for and what are the stages?

Answer 1

-to produce genetically identical daughter cells for : growth, tissue repair and asexual reproduction

1.prophase
2. metaphase
3. anaphase
4. telophase

Question 2

explain prophase

Answer 2

-chromatin becomes visible as it condense/supercoils and is seen in the form of sister chromatids

-nucleolus disappears and nuclear membrane breaks down

-centrioles move to the poles of the cell

spindle made of microtubules forms

Question 3

explain metaphase

Answer 3

-sister chromatids attach to spindle by their centromeres
-they align themselves at the equator of the cell

Question 4

explain anaphase

Answer 4

-spindle fibres shorten and chromatids divide at their centromere and are pulled to the poles

Question 5

explain telophase

Answer 5

-chromatids have reached the poles and are called chromosomes

-they uncoil and become less visible

-the nuclear membrane reforms and nucleus reappears

Question 6

what is the difference in mitosis in animal and plant cells

Answer 6

-centrioles not present in plant cells

-when it undergoes cytokinesis, cell membrane cannot form a furrow so vesicles from the golgi form membrane structure in the centre and fuse = cell plate forms instead of cleavage furrow