Exceptions to the laws – in sweet peas, the shape of pollen and the color of the flowers do not give an independent distribution in the offspring: the descendants remain similar to their parents. There were more and more such exceptions. It became clear that the principle of independent distribution in offspring and free combination does not apply to all genes. On this basis, it was concluded that the strict localization of specific genes in certain pairs of chromosomes.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.