What does tt mean to geneticists? The genotype
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In the field of genetics, "tt" refers to the genotype of an individual at a specific gene locus. Genotype refers to the combination of alleles (alternative forms of a gene) an individual possesses for a particular gene. In this context, "tt" indicates that an individual is homozygous for a specific allele, meaning they have two copies of the same allele for that gene.
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