Question

Secondary oocyte is formed:
a. Before ovum maturation
b. After mitosis of germinal cells
c. After fertilization
d. Before fertilization

Answer 1

It is a youthful ovum or egg cell. An oocyte is delivered in the ovary during female gametogenesis. The female germ cells produce an early stage germ cell (PGC), which at that point goes through mitosis, shaping oogonia. During oogenesis, the oogonia become essential oocytes. An oocyte is a type of hereditary material that can be gathered for cryo conservation.

Complete answer:

The egg delivered from the developed Graafian follicle of an ovary is gotten by the close by fallopian channel and sent into the fallopian pipe and sent into the fallopian tube by developments of fimbriae and their cilia. It is in the auxiliary oocyte stage with the second meiotic division in progress. Their development is finished in the mother's genital lot, generally after the sperm has entered for preparation. In this way, the right answer is 'Before fertilization. So correct option is D

The ovum (egg) is shaped by the cycle of oogenesis. It begins during early-stage development with a huge number of gamete mother cells (oogonia) shaping in the fetal ovary. So, it is not formed after mitosis of germinal cells. So, option B is incorrect.

These processes go through meiosis, however, get briefly captured at the prophase and are called essential oocytes. So, it is not formed before the maturation of the oocyte. Thus, option A is incorrect.

After fertilization, the zygote is formed as a result of fertilization between sperm and ovum. So, option C is incorrect.

Hence, the correct answer is option (D).

Note: Before arriving at pubescence, countless essential oocytes degenerate and the staying ones get encompassed by layers of granulosa cells and new theca and are called auxiliary follicles. The optional follicles are then changed over into tertiary follicles that have a liquid-filled pit called the antrum. At this stage, the essential oocyte present inside the tertiary follicle finishes meiosis, which brings about the development of haploid optional oocyte and a little polar body. This tertiary follicle converts into the Graafian follicle.