PYQ Vault

Day 148: CBSE Class 10 Science

5 questions (8 parts). Try each one first, then open its answer.

  1. Question 1

    Heredity. Asked once: 2024 (same type asked 4 times)

    10
    In an experiment to study independent inheritance of two separate traits : shape and colour of seeds, the ratio of the different combinations in F2\mathrm{F_2} progeny would be

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  2. Question 2 (case study, 4 parts)

    Heredity. Asked once: 2022 (same type asked 4 times)

    Mendel blended his knowledge of Science and mathematics to keep the count of the individuals exhibiting a particular trait in each generation. He observed a number of contrasting visible characters controlled in pea plants in a field. He conducted many experiments to arrive at the laws of inheritance.
    14 (a)
    What do the F1 progeny of tall plants with round seeds and short plants with wrinkled seeds look like ?
    14 (b)
    Name the recessive traits in above case.
    14 (c)
    Mention the type of the new combinations of plants obtained in F2 progeny along with their ratio, if F1 progeny was allowed to self pollinate.
    14 (c) OR
    If 1600 plants were obtained in F2 progeny, write the number of plants having traits : (i) Tall with round seeds (ii) Short with wrinkled seeds Write the conclusion of the above experiment.

  3. Question 3

    How do Organisms Reproduce?. Asked once: 2025 (same type asked 4 times)

    9
    Which one of the following statements is not correct for the plants raised by vegetative propagation ?

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  4. Question 4

    How do Organisms Reproduce?. Asked once: 2024 (same type asked 4 times)

    16
    In which of the following organisms, multiple fission is a means of asexual reproduction ?

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  5. Question 5

    How do Organisms Reproduce?. Asked once: 2024 (same type asked 4 times)

    24
    Identify the organ in the human female reproductive system where the sperm encounters the egg cell. What will happen if it is blocked ? Name the technique by which it can be blocked.