AP Biology Meiosis & Genetics questions and answers Meiosis - (genetics) cell division that produces reproductive cells in sexually reproducing organisms Pluripotent - Stem cells that are capable of developing into most, but not all, of the body's cell types Totipotent - Stem cells with the potential to differentiate into any type of cell. Haploid - term used to refer to a cell that contains only a single set of chromosomes and therefore only a single set of genes Diploid - (genetics) an organism or cell having two sets of chromosomes or twice the haploid number Synapsis - the side by side pairing of homologous maternal and paternal chromosomes at the start of meiosis Tetrads - the paired chromosomes consisting of four chromatids Sister Chromatid - replicated form of a chromosome that will separate during Anaphase Crossing Over - the interchange of sections between pairing homologous chromosomes during the prophase of meiosis Somatic Cells - any cell other than a gamete, has 46 chromosomes, body cells Gametes - sex cellsZygote - a fertilized egg Genotype - Letter combination of alleles, Ex. BB, Bb, bb Phenotype - Physical trait of an organism. Ex. brown hair Homozygous - Having the same alleles.