What is oogenesis? Give a brief account of oogenesis.
What is oogenesis? Give a brief account of oogenesis.
Oogenesis is the process of the formation of a mature ovum from the oogonia in females. It takes place in the ovaries. During oogenesis, a diploid oogonium or egg mother cell increases in size and gets transformed into a diploid primary oocyte. This diploid primary oocyte undergoes first meiotic division i.e., meiosis $I$ or reductional division to form two unequal haploid cells. The smaller cell is known as the first polar body, while the larger cell is known as the secondary oocyte. This secondary oocyte undergoes second meiotic division i.e., meiosis $II$ or equational division and gives rise to a second polar body and an ovum. Hence, in the process of oogenesis, a diploid oogonium produces a single haploid ovum while two or three polar bodies are produced.
Similar Questions
$A$ -Spermatids formed from secondary spermatocytes.
$R$ -The spermatids are transformed into spermatozoa by the process called spermiogenesis.
$A$ -Spermatids formed from secondary spermatocytes.
$R$ -The spermatids are transformed into spermatozoa by the process called spermiogenesis.
Describe the process of spermatogenesis with labelled diagram.
Describe the process of spermatogenesis with labelled diagram.
What do you mean by the term spermateleosis
What do you mean by the term spermateleosis
In mammals growing oocytes are surrounded by special nutritive cells called
In mammals growing oocytes are surrounded by special nutritive cells called
Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis?
$(a)$ It results in the formation of haploid gametes
$(b)$ Differentiation of gamete occurs after the completion of meiosis
$(c)$ Meiosis occurs continuously in a mitotically dividing stem cell population
$(d)$ It is controlled by the Luteinising hormone (LH) and FollicleStimulating Hormone (FSH) secreted by the anterior pituitary
$(e)$ It is initiated at puberty
Choose the most appropriate answer from the options given below:
Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis?
$(a)$ It results in the formation of haploid gametes
$(b)$ Differentiation of gamete occurs after the completion of meiosis
$(c)$ Meiosis occurs continuously in a mitotically dividing stem cell population
$(d)$ It is controlled by the Luteinising hormone (LH) and FollicleStimulating Hormone (FSH) secreted by the anterior pituitary
$(e)$ It is initiated at puberty
Choose the most appropriate answer from the options given below:
- [NEET 2022]