Alleles - A variety of a gene, Locus - Position of gene in chromosome, Crossing over - Exchange of alleles between non-sister chromatids of homologous chromosome during meiosis, Independent assortment - The production of different combination of alleles in daughter cells, Homozygous - Having two identical alleles of a gene, Heterozygous - Having two different alleles of a gene, Phenotype - The observable features of an organism; affected by gene and environment, Recessive - A weak allele that only affect if there is no dominant, Multiple alleles - Existence of three or more allele of a gene, as, for example, in the determination of A, B, O blood groups, Codominant - Allele that affect phenotype when both are present, Monohybrid inheritance - Inheritance of one gene, F1 generation - The off-spring resulting from the cross between individuals with a homozygous dominant genotype, Test cross - A genetic cross in which an organism showing the dominant characteristics is crossed with homozygous recessive organism, Sex chromosomes - Chromosomes that determine sex in humans, Sex linked gene - A gene found on a region of a sex chromosome that is not present on the other sex chromosome, Dihybrid inheritance - The inheritance of two genes, Epistasis - Interaction of two genes in different loci, Autosomal linkage - The presence of two genes on the same autosome, Recombinant - Offspring that show different combinations of characteristics from their parents, Parental type - Offspring that show same combinations of characteristics from their parents,

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