Aberration Different from the normal or usual type, chromosomes into which a Chromatid one of two identical chromosome splits before cell division. in the cell nucleus. Diploid Having paired sets of organisms that reproduce sexually, one set of chromosomes is inherited from each parent. Epididymis A long narrow tube that is part of the system for movement of sperm along with the vas deferens. Fertilization The joining together of male and female gametes. Follicle A small, protective sac, gland, or cluster of cells in the body Gamete A sexual reproductive cell such as a sperm or egg cell, that joins with another cell to form a new organism. Haploid-An organism or cell having only one complete set of chromosomes such as a sperm or egg cell. Hormone Any of various compounds that affect the function of specific tissues in the body. Punnett square In genetics, a type of grid used to show all the possible offspring of the parent organism.