Principles of Genetics - GPB 501 (Question Paper )

  

 

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Q.1. Give the most significant contribution of the following Scientists. (5.0)

1. Knight T (1759)
2. Lamarck (1809)
3. Robert Brown (1831)
4. Mulder (1838)
5. Virchow (1858)
6. Mendel (1866)
7. Weismann (1883)
8. Sutton and Boveri (1902)
9. Bateson (1906)
10. Karpechen K.O. (1928)

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Q.2. Give a clear cut examples of biochemical pathways to explain following inheritance models (5.0)

a) 9:7
b) 15:1
c) 9:4:3
d) 12:3:1
e) 9:6:1

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Q.3. In a particular cross in Drosophila, between two genotypes: normal wing type and vestigial winged recessive mutant, a ratio of 3:1 was obtained. Contrarily in another cross between other two different genetic stocks representing normal winged and vestigial winged recessive mutant a ratio of 15:1 normal: vestigial is obtained. Explain the results with genetic reasons and crosses. (3.00)

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Q.4. State and explain Mendel’s I law of segregation (2.00)