Introduction
Cell cycle refers to the complete sequence of events involving interphase, cell division, (mitosis/meiosis), cell growth, cell aging and cell death.
1. Interphase
- metabolic stage
- no sign of cell division
- cell prepare for cell division
three phases:
G1 (Gap 1) or first growth stage - enzymes and raw materials are made ready for DNA replication.
S phase or synthesis stage - stage of DNA replication.
G2 ( Gap 2) or second growth stage - protein needed for aster and spindle are synthesized.
2. Cell Division
three types of cell division:
Mitosis - effects are growth, repair of damaged tissues happen in body cells. it is a diploid cell.
Meiosis - happen in the sex cell such as egg cell and sperm cell, number of chromosomes are halved. it is a haploid cell.