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Ans: (1) 7
Sol. Mendel took 7 contrasting characters of pea plant for his experiment.
Chromosomal theory of inheritance was proposed by (1) Watson and Crick (2) Sutton and Boveri (3) Bateson and Punnet (4) T.H. Morgan
The term 'Nuclein' for the genetic material was used by (1) Mendel (2) Franklin (3) Meischer (4) Chargaff
Embryological support for evolution was proposed by (1) Alfred Wallace (2) Ernst Heckel (3) Karl Ernst vol Baer (4) Charles Darwin