Mitosis Flashcards
3 key stages of the cell cycle.
1.) Interphase
2.) Nuclear division (mitosis/ meiosis)
3.) Cytokinesis.
What is the longest part of the cell cycle?
- Interphase.
What 3 main things happen in interphase?
1.) Organelles replicate (ie. mitochondria/ ribosomes.)
2.) Cell grows
3.) DNA replicates
What are the 3 different stages of interphase?
1.) G1
2.) S-phase
3.) G2
What happens in G1 stage of interphase?
- Cell grows.
- Organelles (ie. mitochondria/ ribosomes) replicate.
What happens in S-phase of interphase?
- DNA replication.
What happens in G2 phase of interphase?
- Cell grows.
- Replicated DNA is checked for any potential mutations -if there are mutations - the cell will die at this stage.
What is cytokinesis?
- Divison of the cytoplasm/ cell membrane to create the new cells.
Difference between cells produced by mitosis vs meiosis.
- Mitosis: two genetically-identical diploid cells produced.
- Meiosis: four genetically different haploid cells produced
Give 4 reasons why cells divide
1.) Increase cell number
2.) Replace cells and tissues
3.) Produce genetically- identical cells.
4.) Assexual reproduction/ cloning.
What is meant by term “diploid cell?”
- Each cell has 2 copies of each chromosome.
Give an EXAMPLE of where mitosis is important.
- Important in clonal expansion of B- cells.
What is mitosis?
- Part of cell cycle in which eukaryotic cell divides to produce two daughter cells- each with identical copies of DNA produced by the parent cell during DNA replication.
True or False
In all multi-cellular organisms, all cells retain the ability to divide.
- False.
- Not all cells retain the ability to divide.
What are 4 key stages of mitosis?
Prophase
Metaphase
Anaphase
Telophase
