Mitosis Flashcards
What is the purpose of mitosis?
To produce two identical daughter cells with the same chromosomal content as the parent cell
What are the 5 stages of mitosis?
Prophase, prometaphase, metaphase, anaphase, telophase
What is another stage that is included in M phase which follows mitosis? What does it do?
Cytokinesis, cleaves the cell into two
After cytokinesis, how many chromosomes/chromatids are present in the cell?
23 pairs of chromosomes, 46 chromosomes consisting of 1 chromatid each TF 46 chromatids.
What happens in prophase of mitosis?
Chromosomes condense and become visible, nuclear envelope disintegrates, spindle fibres form.
When entering mitosis, how many chromosomes are present in the cell?
23 pairs of chromosomes/46 chromosomes (92 chromatids)
What happens in prometaphase in mitosis?
Protein complex (kinetochores) binds to centromere, spindle fibres attach to kinetochores, brings chromosomes to the equator
What happens in metaphase in mitosis?
Chromosomes align (randomly)along metaphase plate, the chromosomes are then attached to both poles by spindle fibres
What happens in anaphase in mitosis? How many chromosomes/chromatids are then present?
Centromere splits, chromosomes separate and are pulled towards either pole. 92 of both (as chromosomes have only one chromatid)
What happens in telophase in mitosis? How many chromosomes are then present?
Chromosomes cluster at either end, nuclear membrane reforms, organelles reform. Then have 92 chromosomes and 92 chromatids (as chromosomes are of only one chromatid)
