Q2. Arrange the stages of oogenesis in order of their occurrence. (A) Formation of ovum & IInd polar

Q: What is the correct answer for CUET UG Biology Q2?

The correct answer is c. Oogonia 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 ar

Q: Q2. Arrange the stages of oogenesis in order of their occurrence. (A) Formation of ovum & IInd polar body (B) Meiosis Il begins but held at Metaphase Il (C) Meiosis I started but held at Prophase I…

The correct answer is c. Oogonia 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 ar

Q: What are the options for this CUET UG Biology question?

A. (D), (C), (B), (Ε), (A) · B. (C), (E), (D), (A), (B) · C. (D), (C), (E), (Β), (A) · D. (D), (C), (A), (Ε), (B)

Question

Q2. Arrange the stages of oogenesis in order of their occurrence. (A) Formation of ovum & IInd polar body (B) Meiosis Il begins but held at Metaphase Il (C) Meiosis I started but held at Prophase I (D) Formation of primary oocyte from oogonia (E) Completion of Meiosis-I and formation of secondary oocyte and first polar body Choose the correct answer from the options given below:

FirstInTest · Accepted Answer

Oogonia 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 characterised by a fluid filled cavity called antrum. The theca layer is organised into an inner theca interna 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. During fertilization, the secretions of the acrosome help the sperm enter into the cytoplasm of the ovum through the zona pellucida and the plasma membrane. This induces the completion of the meiotic division of the secondary oocyte. The second meiotic division is also unequal and results in the formation of a second polar body and a haploid ovum (ootid).

Answer

(D), (C), (B), (Ε), (A)

Answer

(C), (E), (D), (A), (B)

Answer

(D), (C), (E), (Β), (A)

Answer

(D), (C), (A), (Ε), (B)

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