| A | B |
|---|
| Asexual reproduction | Produces clones, offspring genetically identical to the parent cell |
| Sexual Reproduction | Greater variation among offspring due to recombination of alleles |
| Menstrual cycle | Follicular stage, ovulation, luteal plate, menstruation |
| Spermatogenesis | Process of sperm production, begins at puberty and continues throughout life |
| Oogenesis | Characterized by unequal cytoplasmic division and the formation of only 1 active ovum |
| Cleavage | Rapid mitotic division of the zygote that begins immediately after fertilization |
| Gastrulation | Process that involves rearrangement of the blastula and begins with the formation of the blastopore, and opening in the blatula |
| Organogenesis | Process by which cells continue to differentiate, producing organs from the 3 embryonic germ layers |
| Ectoderm | Becomes the skin and nervous system |
| Mesoderm | Becomes blood, bone, and muscle |
| Endoderm | Becomes viscera, digestive tract |
| Embryonic induction | Ability of one group of embryonic cells to unfluence the development of another group of embryonic cells by switching on certain genes |
| Homeobox | Master genes that control expression of genes responsible for development of specific anatomical structures |
