To protect vulnerable 16 and 17 year olds, the offences of 'abuse of a position of trust' prohibits sexual contact between adults and children under 18 in schools, colleges and residential care.
Chromosome abnormalities usually happen as a result of an error in cell division. Meiosis is the name used to describe the cell division that the egg and sperm undergo when they are developing. Normally, meiosis causes a halving of chromosome material, so that each parent gives 23 chromosomes to a pregnancy.
The division of the cytoplasm occurs after telophase and is called cytokinesis. In animal cells, an invagination of the plasma membrane toward center of the cell appears at the equator of the parent cell and then the cell is trapped in that region and divided into two daughter cells.