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Unformatted text preview: genes present are recessive. Chromosomes - Structures containing genes - humans have 46, 23 pair from each parent. Genes - A unit of DNA material that determines a biological trait. Alleles - Biologically different forms of a given gene. Heterozygous - Having one dominate and one recessive gene for a trait. Homozygous - Having both genes for a trait the same - either dominant or recessive. Genotype- Hereditary makeup, actual genes present (i.e., Brown-Brown, Brown-Blue, Blue-Blue) Phenotype - Physical characteristics expressed by genes (i.e., brown or blue eyes) Blood type Eye color...
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- Fall '08