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Heredity Vocabulary
N/A
9
Science
7th Grade
11/30/2011

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Term
DNA
Definition
Deoxyribonucleic acid; genetic information passed from parents to offspring during sexual reproduction
Term
Sex Cell
Definition
Egg and sperm; contains 1/2 of the genetic material needed to create a new organism
Term
Heredity
(Inheritance)
Definition
The passing of traits from one generation to another
Term
Chromosomes
Definition
Structure foudn in the nucleus of the cell that contains hereditary material (genetic information (DNA))
Term
Allele
Definition
One gene form a pair that codes for a specific trait (represented by capital and lowercase letters); different forms of a gene
T=tall
t=short
Term
Genotype
Definition
The genetic makeup of an organism.
(sets of genes carried by the organism (ex. BB 2 seperate alleles for brown eyes))
Term
Phenotype
Definition
The physical expression of the genes (ex. Brown eyes)
Result of its genotype
"what you see"
Term
Inherited traits
(Heredity)
Definition
The passing of traits from parent to offsping (ex: eye color, eye shape, hair type, face shape)
Term
Dominant trait
Definition
A trait that covers over/dominates another form of that trait.
Trait that will always be expressed in the phenotype (alleles represented by capital letters)
If you have a dominant trait it is always shown
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