Principles of Inheritance and Variation
Chromosome theory of inheritance
- Sutton and Boveri, proposed the theory which was later confirmed by T.H. Morgan.
- The theory explains that the genes are present at a specific loci on chromosomes.
- Later the chromosomes segregate and assort independently during meiosis and further recombine during fertilization.
- Gametes constitute a bridge between 2 generations, that must carry all hereditary traits.
- Both sperm and egg equally contribute in the heredity of offspring and there is a fusion between egg and sperm nuclei.
- Chromosomes are located in nucleus and therefore they must carry the hereditary traits.
- In many organisms, sex of an individual is determined by sex chromosomes.
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