Q.Write the salient features of Sutton and Boveri concept.

The Chromosomal Theory of Inheritance states that Mendel's hereditary factors (genes) occupy specific, fixed positions (loci) on chromosomes, and it is the physical behaviour of chromosomes during cell division that carries this hereditary information from one generation to the next. The theory was built up gradually: Wilhelm Roux (1883) first suggested chromosomes might transmit heredity; Montgomery (1901) showed chromosomes occur as distinct pairs and that maternal and paternal chromosomes pair specifically with each other at meiosis; Boveri (1902) provided strong support that chromosomes carry genetic determiners; and Sutton (1902), independently, recognised the exact parallel between chromosome behaviour and Mendelian factor behaviour during gamete formation. Sutton and Boveri jointly proposed the formal theory in 1903. Its key claims are that somatic cells carry two homologous sets of chromosomes (one maternal, one paternal) derived from the zygote by mitosis; that each chromosome keeps a stable identity across the organism's life; that each c …