Nondisjunction- is a mistake in the chromosomes segregations that involves spindle fibers
Recessive Genes- you usually don't know if you got this disease until you have kids and it passes down to them.
Germ cell-is a cell that contains half of the number of chromosomes which are available when the opposite sex to make a new individual human
mitosis is has the same about of chromosomes that the daughter cells half and Meiosis only have half the chromosomes of the daughter cells.
Down Syndrome- is a physical and mental problem caused by gens and chromosomes