Time: 1 hour
M.M. 30
Attempt all questions.
Q1: A zygote which has an X chromosome inherited from the father will develop into a: (1 Mark)
(a) boy
(b) girl
(c) X chromosome does not determine the sex of a child
(d) either boy or girl
Q2: What is heredity? (1 Mark)
Q3: The Full Form of DNA is __________________________. (1 Mark)
Q4: A trait in an organism is influenced by (1 Mark)
(a) paternal DNA only
(b) maternal DNA only
(c) both maternal and paternal DNA
(d) neither by paternal nor by maternal DNA
Q5: In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plants in F2 is (1 Mark)
(a) 1:3
(b) 3:1
(c) 1:1
(d) 2:1
Q6: A Mendelian experiment consisted of breeding pea plants bearing violet flowers with pea plants bearing white flowers. What will be the result in F1 progeny? (2 Marks)
Q7: What is a gene? (2 Marks)
Q8: Why is the progeny always tall when a tall pea plant is crossed with a short pea plant? (2 Marks)
Q9: Explain how the sex of the child is determined at the time of conception in human beings. (3 Marks)
Q10: Write a difference between inherited traits and acquired traits giving one example of each. (3 Marks)
Q11: Why do mice whose tails were surgically removed just after birth for generations, continue to produce mice with tails? (3 Marks)
Q12: Explain Mendel’s experiment with peas on inheritance of characters considering only one visible contrasting character. (5 Marks)
Q13: A green stemmed rose plant denoted by GG and a brown stemmed rose plant denoted by gg are allowed to undergo a cross with each other. (5 Marks)
85 videos|437 docs|75 tests
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1. What are heredity hobbies? |
2. How do genetics play a role in inheriting hobbies? |
3. Can heredity hobbies be influenced by environmental factors? |
4. Are heredity hobbies limited to specific types of activities? |
5. Can heredity hobbies change over time or be influenced by personal preferences? |
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