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  4. The behaviour of the chromosomes was parallel to the behaviour of genes during meiosis was noted by

Q. The behaviour of the chromosomes was parallel to the behaviour of genes during meiosis was noted by

 7029  226 KEAMKEAM 2012Principles of Inheritance and Variation Report Error

Solution:

In 1900 the significance of Mendel’s work was realised almost simultaneously by three scientists, de Vries, Correns and Tschermark. It was an American, W. Sutton, however, who noticed the striking similarities between the behaviour of chromosomes during gamete formation and fertilization, and the transmission of Mendel’s hereditary factors. Both the chromosomes as well as Mendelian factors (whether dominant or recessive) are transmitted from generation to generation in an unaltered form. The similarities led Walter Sutton and Theodore Boveri (1902) to postulate the “Chromosomal Theory of Inheritance”. According to this theory, each pair of factors is carried by a pair of homologous chromosomes, with each chromosome carrying one of the factors. Since the number of characteristics of any organism vastly out number the chromosomes, as revealed by microscopy, each chromosomes must carry many factors.