Bissoy.com
Doctors Medicines MCQs Q&A

Which of the following statements is/are correct? 1. The process of formation of a mature female gamete is called oogenesis. 2. The tertiary follicle is also known as the Graafian follicle. 3. The secondary oocyte forms a new membrane called zona pellucida surrounding it. 

Which of the following statements is/are correct? 1. The process of formation of a mature female gamete is called oogenesis. 2. The tertiary follicle is also known as the Graafian follicle. 3. The secondary oocyte forms a new membrane called zona pellucida surrounding it.  Correct Answer 1 and 3 only

The correct answer is 1 and 3 only.

Key Points

  • The process of formation of a mature female gamete is called oogenesis which is markedly different from spermatogenesis.
    • Hence statement 1 is correct.
  • Oogenesis is initiated during the embryonic development stage when a couple of million gamete mother cells (oogonia) are formed within each fetal ovary; no more oogonia are formed and added after birth.
  • These cells start division and enter into prophase-I of the meiotic division and get temporarily arrested at that stage, called primary oocytes.
  • Each primary oocyte then gets surrounded by a layer of granulosa cells and is called the primary follicle. 
  • A large number of these follicles degenerate during the phase from birth to puberty.
  • Therefore, at puberty, only 60,000-80,000 primary follicles are left in each ovary.
  • The primary follicles get surrounded by more layers of granulosa cells and a new theca and are called secondary follicles.
  • The secondary follicle soon transforms into a tertiary follicle which is characterized by a fluid-filled cavity called the antrum.
  • The theca layer is organized into an inner theca internal and an outer theca externa.
  • It is important to draw your attention that it is at this stage that the primary oocyte within the tertiary follicle grows in size and completes its first meiotic division.
  • It is an unequal division resulting in the formation of a large haploid secondary oocyte and a tiny first polar body.
  • The secondary oocyte retains the bulk of the nutrient rich cytoplasm of the primary oocyte. 
  • The tertiary follicle further changes into the mature follicle or Graafian follicle.
    • Hence statement 2 is not correct.
  • The secondary oocyte forms a new membrane called zona pellucida surrounding it.
    • Hence statement 3 is correct.
  • The Graafian follicle now ruptures to release the secondary oocyte (ovum) from the ovary by the process called ovulation.

[ alt="5ff5a59c2895331682b1c1e1 16502170309101" src="//storage.googleapis.com/tb-img/production/22/04/5ff5a59c2895331682b1c1e1_16502170309101.png" style="height: 228px; width: 350px;">

Related Questions

The mature follicle that holds the secondary oocyte before release from the ovary is called _________
Which chemical present in the acromial tip of sperm facilitate the penetration of zona pellucida of ovum?
Which of the following statements are correct regarding the general difference between cell and nuclear membranes? 1. A cell membrane occurs in both Eukaryotes and Prokaryotes while a Nuclear membrane occurs only in Eukaryotes.  2. Both cell membrane and nuclear membrane persists throughout the lifetime of a cell. 3. The main feature of the nuclear membrane is the presence of two lipid bilayer structures while a cell membrane has single lipid bilayer structures. Select the correct answer using the code given below.
Consider the following statement: a) In the refrigerator the temperature of the system is more than the surrounding b) In the refrigerator the temperature of the system is less than the surrounding c) In the heat pump the temperature of the system is more than the surrounding d) In the heat pump the temperature of the system is less than the surrounding Which of the above statements is CORRECT?
Each question below is followed by two statements I and II. You have to determine whether the data given in the statements are sufficient for answering the question. You should use the data and your knowledge of Mathematics to choose the best possible answer. What is the average weight of new students added? I. In a class 60% students are male and there average weight is 15 kg more than the female students, 9 males and 6 new female students joined the class and the average weight of the class increased by 0.84 II. Total male students in the class is 12 more than female students adding 9 male students to the class increases the average weight of male students by 1 kg and adding 6 female students increases the average weight of female students by 0.6.
What is the process of the formation of a mature female gamete called?
Consider the following statements: 1. Secondary consolidation occurs at constant effective stress. 2. Secondary consolidation is related to dissipation of pore water pressure 3. Secondary consolidation occurs due to the readjustment of soil skeleton after a disturbance during primary consolidation. 4. Rate of secondary consolidation is controlled by the viscous adsorbed layer surrounding clay particle in soil. Which of the above statements are correct?
During the first meiotic division the primary oocyte divides into a large cell, the secondary oocyte, and a smaller cell called the
The membrane surrounding secondary oocyte is _______
The division of primary oocyte into the secondary oocyte and first polar body is an example of _______