Question

hey answer these please very important can help for board exams



Part A

I. Answer all the following questions 1×4= 4m

1. Define the ‘Law of Independent assortment’?


2. What are variations? How are variations helpful to an organism?


3. Who decides the sex of the baby father or mother? And which chromosomes


4. What examples will you give that Lamarkism is not correct?




II. Answer any 3 of the following questions 2×3= 6m


5. Define phenotype and genotype and give their ratios in case of monohybrid cross.


6. Define vestigial organs? Why is human body called as living museum.


7. What is the reason for Mendel to choose pea plant for his experiment?


8. Write a short on Darwinsm




III. Answer any two of the questions from the following 4×2= 8m


9. Write about evidences of Evolution


10. What are the various traits studied by Mendel. Explain the process of monohybrid cross

taking one trait.


11. Write the Activity to observe the variation in beetle population and its impact.



Part B



IV. Choose the correct answer 4×1/2=2m


12. Gametes produced by male have

A) Only X chromosomes

B) Only Y chromosomes

C) Both X and Y chromosomes

D) Any one of X and Y chromosomes


13. The theory proposed by by Jean Baptist Lamark

A) Malthus Theory

B) Natural selection

C) Inheritance of acquired characters

D) Survival of the fittest


14. Number of pairs of chromosomes in human beings is

A) 22 B) 23 C) 20 D( 46


15. According to Mendel this character is expressed in F1 generation

A) Recessive

B) Dominant

C) Both

D) None

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Answer 1

Answer:

12) c both have X and Y chromosome

15) b dominant

14) b 23 pairs