Question
Extrusion of the second polar body from the egg nucleus occurs:
simultaneously with the first cleavage
after entry of sperm but before fertilization
after fertilization
before entry of sperm into the ovum
According to the text, the secretions of the acrosome help the sperm enter into the cytoplasm of the ovum through the zona pellucida and the plasma membrane. This specific event 'induces the completion of the meiotic division of the secondary oocyte', resulting in the formation of a second polar body and a haploid ovum (ootid). The text states that 'Soon the haploid nucleus of the sperms and that of the ovum fuse together to form a diploid zygote'. Therefore, the extrusion of the second polar body occurs after the sperm enters the ovum but before the actual fusion of the nuclei (fertilization) .
This question aligns with the NEET BIOLOGY syllabus, specifically targeting concepts from Human Reproduction. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.
More Human Reproduction Questions
Which one of the following is the most likely root cause of why menstruation is not taking place in a regularly cycling human female?
The figure given below depicts a diagrammatic sectional view of the female reproductive system of humans. Which one set of three parts out of A-F have been correctly identified?
Seminal plasma in humans is rich in:
Identify the human development stage and its correct site of occurrence in a normal pregnant woman:
Signals from fully developed foetus and placenta ultimately lead to parturition which requires the release of:
Capacitation occurs in:
Menstrual flow occurs due to the lack of:
Which of the following hormone levels will cause release of ovum (ovulation) from the Graafian follicle?
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