Q.16

Which of the following statements about eukaryotic asymmetric cell division is NOT

correct?

(A) Chromosomes are unequally distributed in the daughter cells

(B) Chromosomes are equally distributed in the daughter cells

(C) RNA and proteins are unequally distributed in the daughter cells

(D) Cytoplasmic contents are unequally distributed in the daughter cells

Eukaryotic Asymmetric Cell Division: Correct Answer and Explanation

Eukaryotic asymmetric cell division produces daughter cells with differing sizes, fates, or developmental potentials despite equal chromosome distribution. The incorrect statement claims unequal chromosome distribution, which does not occur.

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Correct Answer

Option (A) Chromosomes are unequally distributed in the daughter cells is NOT correct. In asymmetric cell division, mitosis ensures each daughter cell receives an identical set of chromosomes, preventing aneuploidy.

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Option Explanations

Asymmetric cell division in eukaryotes, such as neuroblasts or stem cells, involves equal nuclear material segregation but unequal partitioning of cytoplasm and determinants.

• (A) Chromosomes are unequally distributed in the daughter cells: Incorrect. Chromosome segregation via the mitotic spindle is equitable, maintaining genetic balance; unequal distribution leads to pathology, not controlled asymmetry.

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• (B) Chromosomes are equally distributed in the daughter cells: Correct. This hallmark distinguishes asymmetric division from cytokinesis errors, as seen in Drosophila neuroblasts.

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• (C) RNA and proteins are unequally distributed in the daughter cells: Correct. Localized determinants like Prospero mRNA in one daughter cell dictate fate differences.

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• (D) Cytoplasmic contents are unequally distributed in the daughter cells: Correct. Uneven partitioning of organelles, proteins, and membrane via cortical flows creates size and functional disparities.

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