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Genetics
Vocabulary
16
Science
8th Grade
03/02/2011

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Term
Gregor Mendel
Definition
"The Father of Modern Genetics" studied plea plants and formed the foundation 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 form of a trait as the planet.
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 the 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. Recessive traits are represented by a 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 alleles that can result from a genetic cross
Term
Phenotype
Definition
the physical appearance of an organism
Term
Genotype
Definition
the genetic makeup or allele combinations
Term
Homozygous
Definition
two identical alleles Ex: TT, tt, etc.
Term
Heterozygous
Definition
two different alleles for a trait Ex: Tt, Yy, Etc
Term
Hybrid
Definition
the offspring of a cross
Term
Incomplete Dominance
Definition
the type of dominance in which an intermediate form of the allele shows up
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