Multiple Choice
The production of haploid ($n$) gametes is the main purpose of which cellular process?
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12. Meiosis
Introduction to Meiosis
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During the creation of an oocyte in humans, three additional haploid cells are produced. What are these cells called?
A
Spermatids
B
Blastomeres
C
Zygotes
D
Polar bodies
Verified step by step guidance1
Understand the process of oogenesis, which is the formation of an oocyte (egg cell) in humans. This process occurs in the ovaries and involves meiosis, a type of cell division that reduces the chromosome number by half, producing haploid cells.
During meiosis, the primary oocyte undergoes the first meiotic division, resulting in two cells: a larger secondary oocyte and a smaller cell called the first polar body. The polar body is a byproduct of unequal cytoplasmic division.
The secondary oocyte then undergoes the second meiotic division, producing the mature ovum (egg cell) and another smaller cell called the second polar body. This division also involves unequal cytoplasmic distribution.
Polar bodies are haploid cells that are produced during oogenesis but do not develop into functional gametes. Their role is to discard the extra chromosomes, ensuring the egg cell has the correct haploid number of chromosomes.
The correct answer to the question is 'Polar bodies,' as these are the additional haploid cells produced during the creation of an oocyte in humans.
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