nichtallelische

Nichtallelisch refers to genes or genetic loci that are located on different chromosomes or are far apart on the same chromosome. This distinction is crucial in genetics, particularly in understanding patterns of inheritance and gene linkage. When genes are nichtallelisch, they assort independently of each other during meiosis. This means that the inheritance of one gene does not influence the inheritance of the other, following Mendel's second law of independent assortment. For example, if a gene for flower color is located on one chromosome and a gene for seed shape is located on a different chromosome, these genes are considered nichtallelisch. Their alleles will segregate and be inherited randomly with respect to each other.

In contrast, allelische genes are located at the same locus on homologous chromosomes. These genes are often linked, meaning their alleles tend to be inherited together, especially if they are physically close on the same chromosome. The concept of nichtallelische genes is fundamental to understanding genetic recombination and the construction of genetic maps. Studying the inheritance patterns of nichtallelische genes allows geneticists to determine if genes are located on different chromosomes or are far enough apart on the same chromosome to exhibit independent assortment. This understanding is vital for predicting offspring genotypes and phenotypes in various breeding programs and for studying the genetic basis of complex traits.