06-02-2013, 03:51 PM
SAMPLE QUESTION PAPER XII- BIOLOGY
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Section - A
1. The turkey usually produces females for several generations. How is this possible?
2. The meiocyte of an onion plant contains 32 chromosomes. Workout the number of chromosomes
found in its endosperm.
3. The gene I that controls the ABO blood grouping in human beings has three alleles IA, IB and i.
(a) How many different genotypes are likely to be present in the human population ?
(b) Also, how many phenotypes are possibly present ?
4. Pick out the ancestral line of Cycads from the list given below -
Ferns, herbaceous lycopods, seed ferns, and horsetails
5. Name the source of smack. Mention one way in which it affects the human body.
6. In plants, how is alien DNA introduced into the host cell ?
7. Mr. Galgotia eats curd / yoghurt. In this case, which trophic level will he occupy?
8. In the absence of the predators, which curve, a) or (b) would appropriately depict the prey population
?