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BJU Life Science 6

Bob Jones Life Science - Chapter 6

genetics The study of the inheritance of traits from one generation to the next.
cross The mating of organisms to test how they inherit traits
allele One form of a gene for particular trait
purebred Having the same alleles for a particular trait
hybrid Having two different alleles for a particular trait
dominant The characteristic that is expressed even when a recessive allele is present
recessive The characteristic that is expressed only in the absence of a dominant allele
phenotype An organism's physical characteristics; the physical expression of an organism's genes
genotype An organism's genetic makeup
Punnett square A diagram used to visualize genetic crosses
incomplete dominance A type of inheritance in which the alleles for a particular characteristic are neither dominant nor recessive, resulting in a "blending" of the two expressions of the gene
codominance The expression (but not blending) of both alleles for a trait in an organism
polygenic inheritance An inheritance pattern in which two or more genes work together to produce a single trait
multiple alleles An inheritance pattern in which there are more than two possible alleles for a single trait, such as human ABO blood types
x chromosome The female sex chromosome
y chromosome The male sex chromosome
sex-linked trait A characteristic that is coded for by a gene on the X chromosome or the Y chromosome
carrier An individual who has one allele for a recessive trait and thus does not exhibit that trait but can pass the allele for the trait on to its offspring
Created by: heidio