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16 Cards in this Set

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Dominant
A gene or trait that will hide or prevent the expression of its allelle. (A capital letter is always used as a symbol for a dominant trait or allele.)
Genotype
The genes in a gene pair for a particular trait. (TT, Tt, tt) (often described by terms such as: homozygous, heterozygous or hybrid.)
Recessive
A gene of trait that is hidden or prevented from expressing by its allele. (lower case symbol is always used for recessive traits)
Heterozygous
The genes in the pair (genotype) are different. One is dominant and one is recessive. (Tt)
Hybrid
An organism that has a dominant and a recessive allele in its genotype of gene pair. ((Tt) It means the same thing as heterozygous.)
Homozygous
The genes in the gene pair (genotype) are the same. Both are dominant or both recessive. (TT or tt) May be used as homozygous dominant (TT) or homozygoug recessive (tt).
Phenotype
The traits that are actually expressed. (What it looks like, such as, red hair, freckles, blue eyes.)
Trait
A characteristic that is determined by a gene. (A piece of DNA)
Allele
Different ways of expressive a particular genetic trait. For example: Eye color is a trait. Blue, brown, green, hazel, gray are alleles of the trait eye color.
Genetics
The branch of biology that deals with how traits are passed from generation to generation.
Gregoe Mendel
Augustinial monk who discovered the basic laws that govern heredity. Called the father of Genetics. 1822-1884 (he was a contemporary of Abe Lincoln)
Punnett Square
A mathematics device used to determine combinations and probabilities in random events.
Karyotype
A display of micrographs of the metaphase chromosomes of a cell, arranged by size and centromere position.
Monohybrid cross
An experimental mating of individuals differing at one genetic locus.
Dihybrid cross
An experimental mating of individuals differing at two genetic loci.
Pedigree
A family tree representing the occurrence of heritable traits in parents and offspring across a number of generations.