Parts of a Cell

Cornell Notes page 23

Genetics

Heredity

Traits

• the study of heredity

• the passing of traits from parent to offspring

• 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

Anton Van Leeuwenhoek

Robert Brown

• Used microscope to view samples of cork

• Gave “cells” their name

• First to see living organisms

• Gave the name “nucleus” to the dark blob seen in cells.

Cell

NucleusChromosomes

GenePair

DNA

Draw and label the parts of a cell…

Inside a city is a library. Inside the library are books filled with chapters made of letters.

Inside a ___ is a ______. Inside the ______are __________filled with _____made of ____.

cell nucleusnucleus chromosomes genes DNA

Human Part Definition It’s like a . . .

Cell smallest unit of a living thing

Nucleus control center (the “brain”)

Chromosome location of genes

Geneinstructions for traits; found in pairs;on chromosomes

DNA genes are made up of this chemical