Fichas
Cell Division - MITOSIS
Fichas del conjunto (17)
- 1What is a Chromosome?-DNA coiled form
-formed during Interphase in plants/animals
-made up of two identical sister chromatids joined by a centromere
-carries 2 copies of the same DNA molecule - 2What is a homologous pair of chromosomes?A pair of chromosomes: 1 maternal (mother) 1 paternal (father) - carries SAME GENES but different ALLELES
-23 pairs in the humans - 3What is Cell Division-FOrmation of new cells in multicellular organisms (animals and plants)
-2 methods ( meiosis and mitosis) - 4What is MeiosisThe cell division that produces different haploid cells as gametes for sexual reproduction
- 5What is MitosisCell division that produces genetically identical cells for growth + repair of tissues
- 6What does Mitosis produce?2 genetically identical cells,
Diploid (full set of chromosomes/ DNA) - 7Benefit of Mitosis?Growth and repair of cells/ tissues
- 8Stages Cell CycleSYNTHESIS - DNA Replication
GAP 1 (G1) - cells grows and produces necessary proteins
MITOSIS - Prophase, Metaphase, Anaphate, Telophase
GAP 2 (G2) Organelle Synthesis - 9Stages of InterphaseG1
Synthesis
G2 - 10Stages of MitosisProphase - DNA coil into chromosomes, nucleus break down, spindle fibres form
Metaphase - Chromosomes line up along equator, spindle fibres attach via centromere
Anaphase - spindle fibres pull, split centromere, sister chromatids move to opposite poles
Telophase - Chromatids uncoil, nucleus reforms ( 2 identical nuclei left) - 11What is Cytokinesis?Separating cell into 2
- 12What happens to DNA mass in mitosis?Halves
- 13What happens to the chromosome number in mitosisStays the same (Diploid)
- 14What is cancer?Formation of a tumour due to uncontrollable cell division (mitosis)
- 15How does uncontrolled cell division occur?-due to mutation of DNA/cell forming cancer cells
-mutation can occur randomly or due to mutagens (chemicals/radiation)
-Cancer cells are rapidly dividing cells ( like hair, skin etc) they spend less time in interphase and more in Mitosis - 16Treatment for Cancer?-Sugary - remove tumour
-Chemotherapy - using drugs that inhibits mitosis in rapidly dividing cancer cells (hair, skin, etc effected)
-Radiotherapy - radiation used to destroy the cells - 17How does Bacteria do Cell Division?Binary Fission
-Copy their DNA and separate into two genetically identical bacteria (asexual)
Información
- Descripción
- A level Biology Fichas sobre Cell Division - MITOSIS, creado por Charlotte Willis el 02/01/2018.
- Creado por
- Charlotte Willis · ene 2018
- Actualizado
- 2 ene 2018
- Visitas
- 19
- Etiquetas
- Valoración