Such information is critical for investigating the genetics of common diseases which in fact have been investigated in humans by the International HapMap Project. It is thought that identifying these statistical associations and a few alleles of a specific haplotype sequence can facilitate identifying all other such polymorphic sites that are nearby on the chromosome. A second use is to mean a set of linked single-nucleotide polymorphism (SNP) alleles that tend to always occur together (i.e., that are associated statistically). First, it is used to mean a collection of specific alleles (that is, specific DNA sequences) in a cluster of tightly linked genes on a chromosome that are likely to be inherited together-that is, they are likely to be conserved as a sequence that survives the descent of many generations of reproduction.

However, there are other uses of this term. It can be all the chromosomes from one of the parents or a minor part of a chromosome, for example a sequence of 9000 base pairs. The haploid genotype (haplotype) is a genotype that considers the singular chromosomes rather than the pairs of chromosomes. A set of pairs of chromosomes is called diploid and a set of only one half of each pair is called haploid. The offspring gets one chromosome in each pair from each parent. Normally these organisms have their DNA organized in two sets of pairwise similar chromosomes. Many organisms contain genetic material ( DNA) which is inherited from two parents. DNA molecule 1 differs from DNA molecule 2 at a single base-pair location (a C/A polymorphism).Ī haplotype ( haploid genotype) is a group of alleles in an organism that are inherited together from a single parent.

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