Outline the process of mitosis

Meiosis is the process of cell division that produces two identical diploid cells, and consists of four stages.

The first stage is called prophase, where the chromosomes condense and cross over to form bivalents. The nuclear envelope also starts to break down and the spindle fibres start to form. The second stage is called metaphase, where the bivalents are lined up by the spindle fibres along the equator. The third stage is called anaphase, where the spindle fibres contract, pulling sister chromatids to opposite ends of the cell away from the equator. The final stage is called telophase, where the spindle fibre breaks down, and nuclear envelopes form around each set of DNA, ready for the cell to be split in two during cytokinesis

AR

Related Biology A Level answers

All answers ▸

Using a genetic diagram, identify the genotypes of the F2 generation of pea pods if a homozygous green pod and a homozygous yellow pod were crossed initially. The yellow pod contained recessive alleles (g).


How does natural selection occur?


How does base deletion in the DNA code produce a nonfunctional protein?


A bacterial infection that cannot be treated with one sort of penicillin can be treated with a different sort. Use your knowledge of enzyme action to explain why the different sort of penicillin is effective in treating the infection.