Parts of a Cell Cornell Notes page 23 Genetics • the study of heredity Heredity • the passing of traits from parent to offspring Traits • Characteristics that are determined by genes. Cell • smallest unit of a living thing. • looked like tiny cells of a monastery/jail. Nucleus • dark spot inside cell • control center; the “brain” Chromosome • inside the nucleus • made up of a long strand of DNA • location of genes • humans have 2 of every chromosome (23 pairs, 46 chromosomes) Gene • instructions for traits • sections of DNA on chromosomes • found in pairs • have specific locations on chromosome DNA • deoxyribonucleic acid • long strands that make up genes (instructions) Robert Hooke • Used microscope to view samples of cork • Gave “cells” their name Anton Van • First to see living Leeuwenhoek organisms Robert Brown • Gave the name “nucleus” to the dark blob seen in cells. Draw and label the parts of a cell… Nucleus Chromosomes Gene Pair DNA Cell Inside a city is a library. Inside the library are books filled with chapters made of letters. cell is a ______. nucleus Inside a ___ chromosomes nucleus Inside the ______are __________ genes DNA filled with _____made of ____. Human Part Definition Cell smallest unit of a living thing Nucleus control center (the “brain”) Chromosome location of genes Gene instructions for traits; found in pairs; on chromosomes DNA genes are made up of this chemical It’s like a . . .