Question:
Just before fertilization, the angiosperm's embryo sac contains ________ and ________ nuclei.
Just before fertilization, the angiosperm's embryo sac contains ________ and ________ nuclei.
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Embryo sac formula:
3 + 2 + 1 = 6 haploid
+ 1 diploid (polar nuclei fused)
+ 1 diploid (polar nuclei fused)
Updated On: May 8, 2026
- six haploid, one diploid
- five haploid, two diploid
- six diploid, one haploid
- seven haploid, one diploid
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The Correct Option is A
Solution and Explanation
Concept: The mature embryo sac (female gametophyte) in angiosperms is typically 8-nucleate and 7-celled.
• 3 antipodal cells (haploid)
• 2 synergids (haploid)
• 1 egg cell (haploid)
• 2 polar nuclei (fuse to form a diploid secondary nucleus)
Step 1: Count haploid nuclei.
• 3 antipodals + 2 synergids + 1 egg = 6 haploid nuclei
Step 2: Count diploid nucleus.
The two polar nuclei fuse to form one diploid nucleus.
Step 3: Total composition.
6 haploid nuclei + 1 diploid nucleus
Step 4: Analyze options.
• (A) Correct
• Others incorrect combinations
Step 5: Conclusion.
Thus, embryo sac contains six haploid and one diploid nucleus. Final Answer: Option (A)
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