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प्रश्न
Describe the structure of the human ovum with a neat labelled diagram.
उत्तर
The human ovum is non-cleidoic, alecithal, and microscopic in nature. Its cytoplasm called ooplasm contains a large nucleus called the germinal vesicle. The ovum is surrounded by three coverings namely an inner thin transparent vitelline membrane, middle thick zona pellucida, and an outer thick coat of follicular cells called corona radiata. Between the vitelline membrane and zona pellucida is a narrow perivitelline space.
structure of the human ovum
संबंधित प्रश्न
Multiple choice question.
The given figure shows human sperm. Various parts of it are labelled as A, B, C, and D. Which labelled part represents acrosome?
If one pollen grain produces two male gametes, how many pollen grains are needed to fertilize 10 ovules?
Mammalian egg is ____________.
Identify the given image and label its parts marked as a, b, c and d
Identify the enzyme released by the sperm which has lytic activity.
Four primary spermatocytes give rise to ______.
First meiotic division is observed in ____________.
In human beings, the largest cell formed during Oogenesis is ______
Which of the following stage of oogenesis forms a membrane called zona pellucida surrounding it?
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
Which of the following groups of cells in the male gonad, represent haploid cells?
The principal tail piece of human sperm shows the microtubular arrangement of ______.
Select the correct sequence of stages of spermatogenesis in a human male ______.
Penetration of the sperm in the ovum is followed by ______
Fetal sex can be determined by examining cells from amniotic fluid looking for:
If for a species 2n = 16, then during Ist prophase and IInd prophase of the meiotic division of a cell, how many tetrads and diads will be formed:
Follicular atresia is:
During reproduction, the chromosome number (2n) reduces to half (n) in the gametes and again the original number (2n) is restored in the offspring, What are the processes through which these events take place?
Draw a neat and labelled diagram of spermatogenesis.
