Heredity - the passing on of physical or mental characteristics, genetics - the study of heredity and the variation, dominant - most important powerful or influential, recessive trait - a trait that is expressed only when genotype is homozygous, allele - one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome., genotype - the genetic constitution of an individual organism., phenotype - the set of observable characteristics, homozygous - having the same version of allases , heterogeneous - having different alleles for a particular trait.,

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