Wilhelm Hofmeister first observed chromosomes during cell division, as early as 1848. However, the chromosome theory of inheritance is credited to two individuals: the papers by Walter Sutton in 1902 and 1903, and to the independent work done around the same time by Theodor Boveri.
In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Chromosomes are only visible during cell division.
The chromosome theory of inheritance is the fundamental unifying theory of genetics which identifies chromosomes as the carriers of genetic material. The theory states that chromosomes are the basis for all genetic inheritance. Chromosomes are seen in all dividing cells and pass from one generation to the next.
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