NEET Reproduction in Organisms PYQs & Practice Questions

10 free NEET Biology questions on Reproduction in Organisms, starting with previous year questions (2016–2026). Tap “Show answer” to check each one. No login needed.

Topics: Features Common to Asexual and Sexual Reproduction · Why 'Clone' Doesn't Apply to Sexually Reproduced Offspring · Occurrence of Binary Fission · Correct Statements About Sexual Reproduction · Haplontic Life Cycle of a Filamentous Alga · Chromosome Numbers Across Generations in Rice · Characteristics of External Fertilisation · Role of Meristematic Nodes in Vegetative Propagation · Evidence That Sexual Reproduction Evolved Later · Source of Variation in Sexually Reproduced Offspring · Occurrence of Dioecious Organisms · Why Single-Celled Organisms Show No Natural Death

1. Q1NEET 2026Sex-determination in honeybees statements

   Which of the following statements are true with reference to the sex-determination in honeybees? A. An offspring formed from the union of a sperm and an egg, develops as a female (queen or worker). B. An unfertilized egg develops as a male by parthenogenesis. C. A male has half the number of chromosomes than that of a female. D. Males produce sperms by meiosis. E. Honeybees have a haplodiploid sex-determination system.

   • A. A, B, C and E only
   • B. A, B, C and D only
   • C. A, B, D and E only
   • D. A, B, D and E only
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   Answer: —

   Honeybees: fertilized eggs (diploid) → females; unfertilized eggs (haploid) → males (parthenogenesis); males have half the chromosome number of females (haplodiploidy). Males, being haploid, produce sperm by mitosis, NOT meiosis (D is false). So A, B, C and E only.

2. Q2NEET 2020Position of ovule attachment to the funicle

   The body of the ovule is fused within the funicle at:

   • A. Hilum
   • B. Micropyle
   • C. Nucellus
   • D. Chalaza
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   Answer: C — Nucellus

   The body of the ovule is fused with the funicle at the chalaza, the basal region of the ovule opposite the micropyle.

3. Q3NEET 2018Asexual methods of seed/fruit production

   Offsets are produced by

   • A. Meiotic divisions
   • B. Parthenogenesis
   • C. Parthenocarpy
   • D. Mitotic divisions
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   Answer: C — Parthenocarpy

   Offsets are a form of vegetative propagation, produced through mitotic (asexual) cell divisions of the parent plant, giving rise to genetically identical offspring.

4. Q4NEET 2016Genetic Variation

   Which one of the following generates new genetic combinations leading to variation?

   • A. Nucellar polyembryony
   • B. Vegetative reproduction
   • C. Parthenogenesis
   • D. Sexual reproduction
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   Answer: C — Parthenogenesis

   Sexual reproduction involves meiosis and fertilization (fusion of gametes from two parents), generating new genetic combinations through recombination, unlike asexual modes which produce genetically identical clones.

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5. Q5Features Common to Asexual and Sexual Reproduction

   A few statements describing certain features of reproduction are given below: (i) Gametic fusion takes place. (ii) Transfer of genetic material takes place. (iii) Reduction division (meiosis) takes place. (iv) Progeny have some resemblance with the parents. Select the option with statements true for BOTH asexual and sexual reproduction.

   • A. (i) and (ii)
   • B. (ii) and (iii)
   • C. (ii) and (iv)
   • D. (i) and (iii)
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   Answer: B — (ii) and (iii)

   Gametic fusion and reduction division occur only in sexual reproduction, not asexual reproduction. However, transfer of genetic material from parent to offspring, and resemblance of progeny to parents, occur in both modes of reproduction.

6. Q6Why 'Clone' Doesn't Apply to Sexually Reproduced Offspring

   The term 'clone' cannot be applied to offspring formed by sexual reproduction because

   • A. offspring do not possess exact copies of the parental DNA.
   • B. the DNA of only one parent is copied and passed on to the offspring.
   • C. offspring are formed at different times.
   • D. the DNA of the parent and the offspring are completely different.
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   Answer: —

   Sexual reproduction involves meiosis and fusion of gametes from two parents, which shuffles genetic material (via recombination and independent assortment), so offspring are not exact genetic copies of either parent — hence they cannot be called clones.

7. Q7Occurrence of Binary Fission

   Asexual reproduction by binary fission is common among: A. Some eukaryotes, B. All eukaryotes, C. Some prokaryotes, D. All prokaryotes. Choose the correct combination.

   • A. A and B
   • B. B and C
   • C. A and C
   • D. C and D
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   Answer: B — B and C

   Binary fission occurs in some eukaryotes (e.g. Amoeba) and in prokaryotes, but it is safer to say 'some' rather than claim it applies universally to every single eukaryote or prokaryote, so the correct combination is 'some eukaryotes and some prokaryotes' (A and C).

8. Q8Correct Statements About Sexual Reproduction

   A few statements regarding sexual reproduction are given below: (i) Sexual reproduction does not always require two individuals. (ii) Sexual reproduction generally involves gametic fusion. (iii) Meiosis never occurs during sexual reproduction. (iv) External fertilisation is a rule during sexual reproduction. Choose the correct statements.

   • A. (i) and (iv)
   • B. (i) and (ii)
   • C. (ii) and (iii)
   • D. (iii) and (iv)
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   Answer: A — (i) and (iv)

   Sexual reproduction can occur even without two individuals, as in self-fertilising hermaphrodites, and it generally involves gametic fusion — both (i) and (ii) are true. Meiosis does occur (during gamete formation), and external fertilisation is not a universal rule, so (iii) and (iv) are false.

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9. Q9Haplontic Life Cycle of a Filamentous Alga

   A multicellular, filamentous alga exhibits a type of sexual life cycle in which meiotic division occurs only after the formation of the zygote. The adult filament of this alga has

   • A. haploid vegetative cells and diploid gametangia.
   • B. diploid vegetative cells and diploid gametangia.
   • C. diploid vegetative cells and haploid gametangia.
   • D. haploid vegetative cells and haploid gametangia.
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   Answer: C — diploid vegetative cells and haploid gametangia.

   In a haplontic life cycle, the zygote is the only diploid stage, and meiosis occurs immediately after zygote formation. This means the entire adult filament — including both its vegetative cells and its gametangia (reproductive structures) — remains haploid throughout its growth.

10. Q10Chromosome Numbers Across Generations in Rice

    The male gametes of a rice plant have 12 chromosomes in their nucleus. The chromosome numbers in the female gamete, the zygote, and the cells of the seedling will be, respectively,

    • A. 12, 24, 12
    • B. 24, 12, 12
    • C. 12, 24, 24
    • D. 24, 12, 24
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    Answer: B — 24, 12, 12

    Since the male gamete is haploid with n = 12, the female gamete of the same species is also haploid with 12 chromosomes. Fusion of the two gametes gives a diploid zygote with 24 chromosomes, and the seedling's somatic cells (derived from the zygote by mitosis) also retain 24 chromosomes.