The Question is from neet-botany plant-growth-and-development , and it was created by the author Mr. NARESH KUMAR K

Question

During oogenesis in mammals, polar bodies are formed. Which statement best describes the function of polar bodies?

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Oogenesis and Meiosis
 **Related Topics**: Gamete formation, chromosome reduction, cytoplasmic division
 **Prerequisites**: Understanding of meiosis, haploid vs. diploid cells, and the process of oogenesis.
## SOLUTION PATHWAY
**Given Information**:
  Polar bodies are formed during oogenesis in mammals.
  We need to determine their function.
**Method & Steps**:
 1. Understand the process of oogenesis.
Oogenesis involves meiosis, a type of cell division that reduces the chromosome number by half.  A diploid germ cell undergoes meiosis I and meiosis II to produce four haploid cells (one ovum and three polar bodies). 
  Reasoning: Meiosis ensures that the resulting gametes have the correct number of chromosomes for fertilization.
  Formula/Rule: None directly applicable.
 2. Analyze the options in light of oogenesis.
  Option A is incorrect because polar bodies are essentially discarded and don't provide nutrients to the oocyte. 
  Option B correctly describes the function of polar bodies: they allow the reduction of the chromosome number to the haploid state, while the majority of the cytoplasm is retained in the single functional ovum (egg cell). This is crucial because the ovum needs ample cytoplasm to support early embryonic development. 
  Option C is incorrect because polar bodies are not involved in fertilization. Fertilization involves the fusion of the sperm and ovum. 
  Option D is incorrect because polar bodies have no role in guiding sperm toward the oocyte.
 3. Final Step:
  Result: The best description of the function of polar bodies is that they allow for chromosome number reduction while retaining most of the cytoplasm in the oocyte.
  Verification: The understanding of meiosis and the unequal cytokinesis during oogenesis confirms the correctness of the answer.
 ## OPTION ANALYSIS
A :x: To provide nutrients to the developing oocyte. (Incorrect; polar bodies are essentially waste products.)
B ✓: To allow for the reduction of chromosome number while retaining most of the cytoplasm in the oocyte. (Correct; This is the primary function of polar bodies.)
C :x: To initiate the process of fertilization. (Incorrect; fertilization involves the fusion of sperm and ovum.)
D :x: To guide the sperm towards the oocyte. (Incorrect; polar bodies have no such function.)
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the function of polar bodies with the role of the oocyte: Students might mistakenly think polar bodies have a nutritive or guiding function.
  2.Failing to understand the unequal cytoplasmic division during oogenesis: This leads to an incorrect understanding of the significance of polar body formation.
 **Quick Tips**:
  1.Remember that oogenesis results in one large ovum and three small polar bodies, reflecting the unequal distribution of cytoplasm.
  2.Focus on the primary role of meiosis in reducing chromosome number and the importance of cytoplasmic content for the developing embryo.

Mr. NARESH KUMAR K · Answer

To provide nutrients to the developing oocyte.

Mr. NARESH KUMAR K · Answer

The correct Option is "To allow for the reduction of chromosome number while retaining most of the cytoplasm in the oocyte."

Mr. NARESH KUMAR K · Answer

To initiate the process of fertilization.

Mr. NARESH KUMAR K · Answer

To guide the sperm towards the oocyte.

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