Principle of Inheritance Test-1 Class 12 Notes | EduRev

Class 12 : Principle of Inheritance Test-1 Class 12 Notes | EduRev

 Page 1


CBSE TEST PAPER-02 
CLASS - XII BIOLOGY (Principle of Inheritance) 
1. What genetic principle could be derived from a monohybrid cross? [1] 
2. Which one change is the cause of sickle – cell anaemia ? [1] 
3. What is a test cross? [1] 
4. Why do sons of haemophilic father never suffer from this trait? [2] 
5. How is the child affected if it has grown from the zygote formed by an XX-egg
fertilized by Y-carrying sperm? What do you call this abnormality? 
[2] 
6. The map distance in certain organism between genes A & B is 4 units,
between B & C is units, & between C & D is 8 units which one of these gene 
paves will show more recombination frequency? Give reason. 
[2] 
7. A man with AB blood group marries a woman with O group blood.
(i) Work out all the possible phenotypes & genotypes of the progeny. 
(ii) Discuss the kind of domination in parents & progeny in this case? 
[3] 
8. In an cross made between a hybrid tall & red plant (TtRr) with dwarf & white
flower (ttrr). What will be the genotype of plants in F 1 generation? 
[3] 
9. Differentiate between dominance, co-dominance & Incomplete dominance
with one example each. 
[5] 
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