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Heredity Vocab

TermDefinition
Allele one of the alternative forms of a gene that governs a characteristic, such as hair color.
Autosome Any chromosome that is not a sex chromosome
Codominance A condition in which both alleles for a gene are fully expressed
Dominant trait the trait observed when at least one dominant allele for a characteristic is inherited
Genetics the Science of heredity and of the mechanisms by which traits are passed from parents to offspring.
Genotype the entire Genetic makeup of an organism; also the combination of genes for one or more specific traits.
Heredity the Passing of genetic traits from parent to offspring
heterozygous Describes an individual that has two different alleles for a trait
Homozygous describes an individual that has identical alleles for a trait on both homologous chromosomers.
Incomplete dominance a condition in which a trait in an individual is intermediate between the phenotype of the individual's two parents because the dominant allele is unable to express itself fully.
Monohybrid cross A cross between individuals that involves one pair of contrasting traits
Pedigree A diagram that shows the occurrence of a genetic trait in several generations of a family.
Phenotype An organism's appearance or other detectable characteristic that results from the organism's genotype and the environment.
Probability the likelihood that a possible future event will occur in any given instance of the event; the mathematical ratio of the number of times one outcome of any event is likely to occur to the number of possible outcomes of the event.
Punnett Square A graphic used to predict the results of a genetic cross.
Recessive Trait A trait that is apparent only when two recessive alleles for the same characteristic are inherited
Sex-linked Trait a trait that is determined by a gene found on one of the sex chromosomes, such as the X chromosome or the Y chromosome in humans
Test Cross the crossing of an individual of unknown genotype with a homozygous recessive individual to determine the unknown genotype
Created by: Christensent