genotip

Genotip, or genotype, is the genetic constitution of an individual or cell, describing the specific alleles carried at one or more gene loci. It contrasts with phenotype, the observable characteristics determined by gene expression and environmental factors. The term can refer to the entire set of an organism's genes (the genome) or to the alleles at a single locus. In diploid organisms, individuals may be homozygous—having two identical alleles—or heterozygous—having two different alleles—for a given gene.

Genotyping is the laboratory process used to determine an organism's genotype. Techniques range from targeted genotyping of single loci to comprehensive whole-genome sequencing. Practical methods include DNA sequencing, PCR-based assays, SNP genotyping arrays, and restriction fragment length polymorphism analyses.

Genotype has many applications. In medicine, knowledge of genotype informs disease risk assessment, pharmacogenomics, and personalized treatment strategies. In agriculture and animal breeding, genotypes are selected to improve traits such as yield, disease resistance, or quality. In research and population genetics, genotype data are used to study inheritance patterns, trait mapping, and evolutionary history. Forensics may use genotyping for identification based on DNA profiles.

Limitations and caveats exist. A genotype does not by itself determine phenotype; gene expression, epigenetic regulation, and environmental factors influence trait realization. Penetrance, expressivity, and gene interactions can complicate predictions. Privacy and data interpretation issues are also important considerations in genotyping projects.