Genetic Terminology Below you will find terms and their definitions. These terms will be used within the lessons. Please read their definitions so that you may better understand what is being spoken about within each lesson.
Allele- one member of a pair or series of genes that occupies a specific position on a specific chromosome
Chromosome- a threadlike linear strand of DNA and associated proteins in the nucleus of an animal that carries the genes and functions in the transmission of hereditary information
Dilution- an effect that causes a degree of lightening to the melanin of the coat or skin pigmentation
Dominant- being an allele that produces the same phenotypic effect whether inherited with a homozygous or heterozygous allele.
Eumelanin- a melanin pigmentation that is some shade of black or brown
Gene- a portion of a DNA molecule that serves as the basic unit of heredity, controls the characteristic that the offspring will have by transmitting information
Genotype- The combination of alleles located on homologous chromosomes that determines a specific characteristic or trait.
Homozygous- relating to a cell that has two identical alleles for a particular trait at corresponding positions on homologous chromosomes
Heterozygous- relating to a cell that has two different alleles at corresponding positions on homologous chromosomes.
Loci- (plural) "locality", the position that a given gene occupies on a chromosome.
Locus- (singular) "locality", the position that a given gene occupies on a chromosome.
Phaeomelanin- a melanin pigmentation that is some shade of red, orange, gold or yellow
Phenotype- The physical appearance of an organism as distinguished from its genetic makeup.
Recessive- expressed only when the determining gene is in the homozygous condition
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