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Genetics
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16
Science
8th Grade
03/02/2011

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Term
Gregor Mendel
Definition
"The father of modern Genetics" studied pea plants and formed the foudation of modern day genetics.
Term
Genetics
Definition
The study of heredity.
Term
Heredity
Definition
The passing of traits from parents to offspring.
Term
Purebred
Definition
Organism that always produces offspring with the same from of a trait as the parent.
Term
Genes
Definition
Factors that control traits.
Term
Alleles
Definition
The different forms of a gene.
Term
Dominant Allele
Definition
An allele whose trait always shows up in organism when the allele is present; It masks the recessive trait and is represented by a capital letter.
Term
Recessive Trait
Definition
An allele that is masked or covered up whenever the dominant allele is present. Ressive Trait are represented by lower case letter.
Term
Probability
Definition
The likelihood that a particular event will occur.
Term
Punnett Square
Definition
A chart or tool to predict all the possible combinations of allels that can result from a genetic cross.
Term
Phenotype
Definition
The physical apperance of an organism.
Term
Genotype
Definition
The genetic makeup or allele combinations.
Term
Homozygous
Definition
2 indentical alleles Ex: TT, tt, etc.
Term
Heterozygous
Definition
2 different allels for a trait. Ex:Tt, Yy, etc.
Term
Hybird
Definition
The offspring of a cross.
Term
Incomplete Dominance
Definition
The type of dominance in which an intermediate form the allel shows up. Ex: a red flower is crossed with a white flower and the result is a pink flower. Incomplete dominance is shown as capital letters; RR for red flowers; WW for white flowers and RW for pink flowers.
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