Answer:
A common birth defect that is usually due to an extra chromosome 21( trisomy 21) .
They carry on different on jobs to help the cell work. For example, mitochondria produces energy from the oxidation of glucose.
Meiosis has two rounds of genetic separation and cellular division while mitosis only has one of each. In meiosis homologous chromosomes separate leading to daughter cells that are not genetically identical. In mitosis the daughter cells are identical to the parent as well as to each other.
