What is Recombination?
The interchange of genetic materials between different species, also known as genetic recombination or genetic reshuffling, results in the production of offspring with combinations of traits that differ from those that originate in either parent. In eukaryotes, meiosis-induced genetic recombination can produce a new genetic data sequence that can be approved from the parents to the offspring. Recombination typically happens in nature.
Genetic recombination in eukaryotes comprises the linking of homologous chromosomes during meiosis. The transfer of information across chromosomes may be used to monitor this.
Types of Recombination
Two different types of recombination exist:
- Homologous Recombination: During meiosis, this kind of recombination takes place between chromosomes with comparable sequences.
- Non-Homologous Recombination: This happens between unrelated chromosomes.
- Site-specific Recombination: This is seen in extremely brief episodes that typically have commonalities.
- Mitotic recombination: Interphase is when mitotic recombination takes place. However, this kind of recombination is typically bad and can cause cancers. Radiation exposure to the cells causes an increase in it.
One of the following three procedures results in recombination in the prokaryotic cells:
- Conjugation
- Transformation
- Transduction
Recombination of Linked genes
To further understand how related genes recombinant, let’s use the example of freckles and red hair. People have freckles and red hair because the genes for both are located on the same chromosome. It is uncommon for the DNA to be divided between the two genes during homologous recombination. Although homologous recombination happens frequently, the likelihood of the DNA coding for these two genes splitting up is relatively low, hence the two traits are typically inherited together. As a result, genes frequently pass down in pairs.
Linkage And Recombination – Principles Of Inheritance And Variation Class 12 NCERT
CBSE Class 12- Principles Of Inheritance And Variation- Linkage And Recombination: Linkage and recombination are the phenomena that describe the inheritance of genes. Linkage and Recombination both are related to the genetic information inherited from parents to offspring. Linkage is the tendency of genes present close to each other on a chromosome to be inherited together more frequently than expected by chance. Recombination is the process by which genetic information from 2 parent chromosomes is mixed and exchanged during meiosis, resulting in new combinations of alleles in the offspring.
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