Transheterozygous

Transheterozygotes are heterozygous organisms whose recessive genes are located on different chromosomes, allowing them to exhibit both dominant and recessive traits. This occurs because the genes responsible for dominant and recessive phenotypes are located on different chromosomes and can be passed on from parents with different genotypes.

Transheterozygosity can occur as a result of crossing over, when two chromosomes exchange sections of genetic information. As a result of this exchange, genetic information can be transferred to another chromosome, which leads to the appearance of transheterozygotes.

For example, consider the gene responsible for eye color. This gene can be represented by two alleles - dominant (A) and recessive (a). If both parents have the A allele, then their child will have the dominant gene and, accordingly, will have brown eyes. However, if one parent has the a allele and the other the A allele, then the child will be heterozygous and have the ability to exhibit both brown and blue eyes.

In the case of transheterozygosity, the recessive a gene may be located on one chromosome, and the dominant allele A may be located on another chromosome. The child will be heterozygous for both alleles and will have the opportunity to exhibit both brown and blue eye phenotypes, depending on which chromosome is dominant.

Thus, transheterozygosity is an important genetic mechanism that allows organisms to exhibit different phenotypes depending on genetic factors inherited from their parents. This may have implications for medical genetics, where the study of transheterozygotes can help in the diagnosis and treatment of hereditary diseases associated with various genetic mutations.

Transheterocyss - heterocyss (or bidominant heterocyss) 2.3 Transheterosygote (transheterozygous crossing). For their parents homo-parent pair XYX XYY and hetero-parent pair YYX XXX the same rule remains true. The offspring will be phenotypically homogeneous and will have the genotype XXX YYY or YXY XXY. This effect is called the rule of dominant X-effect on the results of I-x crossing of pure lines.