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NEET 2017 · BiologyPrevious Year Question

Zygotic meiosis is characteristic of

Answer: (D) Chlamydomonas. Answer: (D) Chlamydomonas.

  1. A.Marchantia
  2. B.Fucus
  3. C.Funaria
  4. D.Chlamydomonas✓

Correct Answer

(D) Chlamydomonas

Solution & Explanation

Answer: (D) Chlamydomonas. Solution: Zygotic (initial) meiosis means the zygote is the only diploid cell and it divides meiotically immediately on germination, which is the haplontic life cycle typical of many green algae. Chlamydomonas, a green alga, is haplontic and shows zygotic meiosis. Marchantia (a bryophyte) and Funaria (a moss) are haplo-diplontic, while Fucus (a brown alga) is diplontic with gametic meiosis, so none of these show zygotic meiosis. NCERT Reference: Class XI Biology, Plant Kingdom (Plant Life Cycles & Alternation of Generations — content rationalised from current reprint, grounded in pre-2023 NCERT text). Chlamydomonas is listed as a green alga in the current reprint at p.26, line 35 — "Some commonly found green algae are: Chlamydomonas, Volvox, Ulothrix, Spirogyra and Chara".

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