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Science 604
Molecular Genetics
18
Science
5th Grade
06/08/2012

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Term
Genetics
Definition
the science of heredity, the passing on of the characteristics of living organisms from one generation to the next.
Term
Purebred
Definition
an organism having the same genes for a particular trait.
Term
Hybrid
Definition
the resulting offspring from a cross between two individuals differing in one or more genes.
Term
Heredity
Definition
the passing on of the characteristics of living organisms from one generation to the next. It includes all of the traits inherited by an organism.
Term
Dominant gene
Definition
a gene which produces its effect even though an opposite gene is present.
Term
Recessive gene
Definition
a gene which does not produce its effect when an opposite dominant gene is present.
Term
Trait
Definition
a characteristic carried by a gene.
Term
Incomplete Dominance
Definition
a condition where neither gene dominates the other, a blended effect is produced.
Term
Gene
Definition
a unit of DNA which determines traits
Term
Albino
Definition
any plant or animal that has pale, defective coloring.
Term
Chromosome
Definition
Rod-shaped part of a reprodcutive cell that carry the genes (the hereditary material)
Term
DNA, or deoxyribonucleicacid
Definition
a very large, complex protein molecule that forms a double-helix shape and is contained in the chromatic of cells. It forms the substance of genes.
Term
Evolution
Definition
a process of change in a certain direction. It also a name for several scientific theories about how life began and developed on the earth.
Term
Multiple genes
Definition
several genes which affect a trait.
Term
Mutation
Definition
a change in a gene; a mistake or misprint in the DNA molecule; in some case,a loss or addition of an entire chromosome or part of it.
Term
Nucleus
Definition
the command center that controls the life and activity of the cell. It is located within the cytoplasm of the cell.
Term
Ribose
Definition
a kind of sugar present in all plant and animal cells.
Term
Variegated
Definition
marked with different colors.
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