| A | B |
|---|
| adolescence | stage of development between childhood and adulthood when children become adults physically and mentally |
| allele | the different forms of a gene |
| amniotic sac | a fluid-filled sac that cushions and protects a developing fetus in the uterus |
| asexual reproduction | the reproductive process that involves only one parent and produces offspring that are identical to the parent |
| chromosome | a rod-shaped cellular structure made of condensed chromatin;contains DNA; carries trait information (eyes, hair, etc). |
| DNA | Deoyribonucleic acid; genetic material with info about offspring (babies) like color, eyes, etcÂ… |
| dominant allele | An allele whose trait always shows up in the organism when the allele is present |
| egg | a female sex cell |
| embryo | a developing human during the first eight weeks after fertilization |
| endocrine glands | an organ which produces and relases its chemical products directly into the bloodstream. |
| estrogen | a hormone produced by the ovaries that controls the development of adult female characteristics |
| fertilization | the joining of a sperm cell and an egg cell |
| fetus | a developing human from the 9th week of development until birth |
| gene | a segment of DNA on a chromosome that codes for a specific trait |
| genetics | the scientific study of heredity |
| heredity | the passing of traits from parents to offspring |
| hormone | a chemical that sppeds up or slows down the activities of an organ or tissue. |
| hypothalamus | a tiny part of the brain that links the nervous system and the endocrine system. |
| menstral cycle | the monthly cycle in females where an egg develops and the uterus prepares for the arrival of a fertilized egg |
| menstruation | the process of blood flow from the female vagina by the shedding of the inside lining of the uterus |
| negative feedback | when a system is turned off by the condition it produces; example ??? |
| ovary | organ of the female reproductive system in which eggs and estrogen are produced |
| oviduct | a passageway for eggs from an ovary to uterus; fertilization usually occurs here |
| ovulation | release of an egg from a woman's ovary |
