Chapter 4 & 14

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Think Psychology
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1

natural selection

a theory that states orgnaism best adapted to their environment tend to survive and transmit their genetic characteristics through generation

2

chromosomes

are long strands of genetic material found in the nuclei of all cells

3

chromatids

are pairs of duplicated chromosomes

4

centromere

is the place where two chromatids meet

5

DNA

a complex molecule that is the main ingredient of chromosomes; forms the code for all genectic information

6

genes

sections of DNA that contain specific recipes to make proteins in the body

7

genome

is the complete set of instructions for making an organism

8

External environment

consists of events and conditions in the outside world

9

Chemical environment

consists of events and conditions inside the organism

10

Genotype

is the entier set of genes inherited by an organism

11

Phenotype

is the observable property that comes from a genotype