| A | B |
|---|
| adolescence | the period of development during which puberty takes place and a person grows into adulthood |
| nucleus | the cell's control center |
| heredity | the passing of traits from parents to their children |
| compromise | settle a difference of opinion by mutual agreement |
| dominant gene | a gene that results in a displayed trait when two genes for a single trait, such as eye color, carry different codes |
| ovum | egg cell supplied by the mother in human reproduction; the largest of all human cells |
| growth spurt | a period of rapid growth |
| sibling | a brother or sister |
| chromosome | long strand of matter in cell nuclei containing the DNA molecule together with other chemicals |
| puberty | the physical process in which your body begins to develop reproductive cells |
| self-discipline | the ability to control your actions |
| pituitary gland | the "master gland"; releases more then two dozen hormones, most importantly the growth hormone, that regulate the activity and hormonal output of other endocrine glands |
| endocrine system | body system that includes organs called glands that make chemicals to help regulate development and growth |
| genes | chemical codes for all inherited traits |
| fetus | the stage in human growth from about three months after conception until birth |
| acne | a common skin disorder caused when excess oil plugs the pores of the skin; resulting in pimples that erupt on the face and upper body areas |
| sperm | cell supplied by the father in human reproduction; the smallest of human cells |
| perspiration | wetness; sweat produced by sweat glands |
| inherited traits | characteristics passed on from parents to their children |
| responsible | other people can depend on you because you keep your word, you don't need others to remind you to do things, and you try to resolve conflicts by yourself |
| Calories | units used to measure the amount of energy the body is able to obtain from a food |
| recessive gene | a gene that does not result in a displayed trait when two genes for a single trait, such as eye color, carry different codes |
| stamina | the ability to work or exercise for long periods of time without getting tired |
| embryo | the stage in human reproduction from about two weeks until three months after conception |
| maturity | the stage of full development as an adult |
| DNA | a long spiral molecule found in cell nuclei that codes for inherited traits |
| hormones | the chemicals released by glands that tell the body how to develop, grow , or react |
| hygiene | practices that keep a person clean and healthy |
| mitosis | process in which the body's cell divide and make new cells |
