2.1 Cell division Flashcards
def of Chromosomes
where genetic information is found
def of mitosis
Part of the cell cycle where one set of new chromosomes is pulled to each end of cell forming two identical nuclei during cell division
def of cell cycle
three-stage process of cell division in a body cell that involves mitosis resulting in forming two identical daughter cells.
def of DNA
Unique chemical that makes up genetic material.
def of gene
Section of DNA that controls a
characteristic
How many chromosomes does a human have
46 chromosomes
23 pairs
Why is cell division important by mitosis for the body
growth and development, replace worn out cells
repair damaged tissue
What happens in asexual reproduction
the cells of the offspring are produced by mitosis from the cells of their parent.
Stages of cell cycle (look at diagrams on physical flashcards)
Stage 1:chromosomes replicated and all sub-cellular structures such as
mitochondria and ribosomes reproduced
stage 2: Mitosis happens,
nucleus divides to form two identical daughter nuclei
stage 3:cytoplasm and cell membranes divide to make two
independent cells.
Why is it important for the chromosome number to stay the same when the cells divide to make other normal body cells
You could lack vital genes
new cells would not work properly
organism might die
def of nucleus
where genetic information is found
Explain why cell division by mitosis is so important in the body
New cells needed for growth and development, and worn out or
damaged cells must be replaced with identical cells.
Mitosis produces cells with same chromosomes and identical genetic
material, which fulfil same function as original cells.
