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1. Name one trait that does not blend.

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(i) Lethality : Sickle cell anaemia.

(ii) Multiple allelism : ABO blood groups.

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3. What for symbols AA and Aa stand ?

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4. Mention the phenomenon of pleiotropy by giving an example.

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5. Name the plant that shows incomplete dominance in respect of the colour of its flower.

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6. Write the genotypes of man with blood group A.

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7. What is Mendel’s monohybrid phenotypic ratio ?

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8. Write down Mendel’s dihybrid Phenotypic ratio

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9. Who were the rediscoverers of Mendelism ?

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10. What are the real determinants of what an organism will become ?

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