Morgan coined the term recombination to describea)Physical association...
Morgan coined the term "recombination" to describe the generation of new, non-parental gene combinations due to crossing over during meiosis.
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Morgan coined the term recombination to describea)Physical association...
Understanding Recombination
Recombination is a fundamental genetic process that plays a critical role in the generation of genetic diversity.
Definition of Recombination
Recombination refers to the process by which genetic material is exchanged between chromosomes, leading to the formation of new combinations of alleles. This is crucial during meiosis, where homologous chromosomes undergo crossing over.
Key Points about Recombination
- Non-parental Gene Combinations: Recombination results in the generation of non-parental combinations of genes. This means offspring can inherit different combinations of traits than those found in their parents.
- Mechanism: During meiosis, homologous chromosomes pair up and can exchange segments of DNA. This exchange can create new allele combinations on the chromosomes.
- Significance: The generation of non-parental gene combinations enhances genetic variability within a population, which is essential for evolution and adaptation to changing environments.
- Contrast with Other Options:
- Option (a) refers to the physical association of genes, which is related but does not capture the essence of recombination.
- Option (b) describes mutation, which is a different mechanism of generating genetic variation.
- Option (c) discusses linkage, which pertains to genes located on the same chromosome, but does not involve the exchange of genetic material.
Conclusion
In summary, recombination is pivotal in producing non-parental gene combinations, thereby contributing to genetic diversity. Understanding this concept is essential for grasping the principles of inheritance and evolutionary biology, making it a crucial topic for NEET aspirants.
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