Genetic Terminology - Genetic Terminology ALLELE One of the...

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Genetic Terminology ALLELE: One of the alternate forms of the same functional gene. Alleles occupy the same position (locus) on homologous chromosomes and are separated from each other at meiosis. CHARACTER: A heritable trait, such as flower color, that varies among individuals. DOMINANT: Applied to an allele that overshadows or masks the effect of another allele. A dominant allele is one which affects the phenotype when present in either the homozygous or heterozygous conditions. DIHYBRID CROSS: A cross involving two characters. FIRST FILIAL GENERATION (F1): The first generation progeny of a parental generation. The offspring produced by the parental generation. GENE: The unit of heredity that occupies a particular locus on a chromosome. Genes consist of DNA and are responsible for directing the synthesis of polypeptides or proteins. GENOTYPE: The genetic makeup of a trait. HEMIZYGOUS: When an organism has only a single allele for a given character. HETEROZYGOUS: When an organism has different alleles for a given character. HOMOZYGOUS: When an organism has the same alleles for a given character. INCOMPLETE DOMINANCE: A situation in which neither allele is dominant to the other, with the results that, when the genotype is heterozygous, both are expressed in the phenotype, which
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Genetic Terminology - Genetic Terminology ALLELE One of the...

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