The process of meiosis in sufficient detail to show: two nuclear divisions resulting in four haploid daughter cells from one diploid parent cell; genetically different daughter cells result from independent segregation of homologous chromosomes; crossing over between homologous chromosomes results in further genetic variation
Meiosis is a type of cell division that produces four sex cells. Each sex cell is genetically unique because chromosomes are shuffled in two different ways during the process.
Real World
Human sperm and egg each contain 23 chromosomes (haploid); fertilisation restores 46 (diploid). Without the two meiotic divisions halving chromosome number, each generation would double it — making normal development impossible.
Exam Focus
In 'describe meiosis' questions, explicitly state that meiosis I separates homologous pairs and meiosis II separates sister chromatids — examiners expect this distinction.
Evaluation Scaffold
A four-step framework for high-quality evaluation. Use this for 'assess', 'evaluate', and 'to what extent' questions.
How well did you know this?