L8 MITOSIS Flashcards
What are the three points of cell theory?
- All organisms are made of 1+ cells
- Cells are the basic building block of life
- All cells come from existing cells.
What is chromatin?
Non-compressed strand of DNA+proteins in the nucleus.
What is chromosome?
Tightly condensed chromatin, shape during mitosis.
What is an autosome?
Non-sex chromosome
What is karyotype?
An individual’s complete set of chromosomes.
What are the three stages of interphase?
- G1= cell growth
- S= DNA replication
- G2= cell function & error check
What are the two stages of mitotic period?
- Mitosis
- Cytokinesis
What is centromere?
Area where sister chromatids attach.
What is kinetochore?
Disk shape proteins that hold chromatids together at centromere.
What is a chromatid?
One single strand of compressed chromatin.
What is a centriole?
Cylindrical organelle that organizes microtubule spindle fibres.
What is centrosome?
Composed of 2 centrioles, creates the spindle fibres.
When are chromatids formed?
Chromatids are formed in S stage of interphase.
How to tell plant cell mitosis apart from animal cell mitosis? (2 features)
- Plant cell will have cellular plate formation in telophase, plant cell unable to create cleavage furrow
- Plant cells lack centrosome.
During which phase will you find the most amount of DNA?
G2 after DNA replication is complete.
When is a chromatid considered a chromosome?
Once sister chromatids are pulled apart in anaphase, each one is now considered a chromosome.
