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Chapter 22: Heredity and Evolution
Lesson 1: Heredity
12
Biology
9th Grade
02/10/2011

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Term
heredity
Definition
The passing of traits from parents to offspring.
Term
gene
Definition
A section of DNA that carries a trait.
Term
chromosome
Definition
A rod-shaped structure that contains DNA and is found in the nucleus of a cell.
Term
Genetics
Definition
The study of heredity.
Term
environment
Definition
An organism's surroundings.
Term
mutation
Definition
A change in a gene.
Term
base
Definition
A molecule found in DNA that is used to code information.
Term
replicate
Definition
To make a copy of.
Term
mitosis
Definition
The process that results in two cells identical to the parent cell.
Term
diversity
Definition
The range of differences found among the members of a population.
Term
adaptation
Definition
A change or adjustment that makes an organism better able to survive in its environment.
Term
meiosis
Definition
The process that results in sex cells.
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