BiologyCode 9700
Replication and division of nuclei and cells
What this topic asks you to be able to do
- describe how a chromosome is built, limited to: its centromere and telomeres, its sister chromatids, and its DNA and histone proteins
- account for why mitosis matters in producing genetically identical daughter cells when: multicellular organisms grow, damaged or dead cells are swapped for new ones, tissues are mended by replacing cells, asexual reproduction takes place
- outline the course of the mitotic cell cycle, including: interphase (growth across the G1 and G2 phases, and copying of DNA in the S phase), mitosis, cytokinesis
- outline how telomeres help stop genes being lost from the tips of chromosomes during DNA replication
- outline what stem cells contribute to replacing cells and mending tissue through mitosis
- account for the way that cell division running out of control can lead to a tumour forming