Meiosis, chromosome number, polyploidy

Nondisjunction - a failure either of two homologous chromosomes to pass to separate cells during the first meiotic division, or of the two chromatids of a chromosome to pass to separate cells during mitosis or during the second meiotic division. As a result, one daughter cell has two chromosomes or two chromatids, and the other has none. If this happens during meiosis, an aneuploid individual (for example, a child with Down syndrome) may develop following fertilization. #meiosis #mitosis #genetics #DNA #ChromosomeNondisjunction #zygote #polyploid #biology #homologousChromosomes #meioticDivision #chromatids #Aneuploid #fertilization