At puberty, there is an increase in testosterone levels; this initiates meiosis I. During this stage, a primary spermatocyte generates two secondary spermatocytes, which then undergo meiosis II. Two haploid spermatids (haploid cells) are generated by each secondary spermatocyte, resulting in a total of four spermatids.
Is spermatogenesis a meiosis?
Spermatogenesis is the process by which male primary sperm cells undergo meiosis and produce a number of cells calls spermatogonia, from which the primary spermatocytes are derived.
What is the stage of spermatogenesis?
Spermatogenesis is comprised of the following stages: spermatocytogenesis, spermatidogenesis, and spermiogenesis. In the first stage (spermatocytogenesis), there is high mitotic activity. The undifferentiated male germ cells,spermatogonia, undergo mitosis resulting in the production of more spermatogonia.
Where does the process of spermatogenesis occur?
As mentioned above, spermatogenesis is the process by which sperm cell production occurs; the germ cells give rise to the haploid spermatozoa. Sperm production takes place inside the seminiferous tubules, which is a convoluted cluster of tubes located inside the testes.
What occurs during spermatogenesis quizlet?
That portion of the process of spermatogenesis during which the transformation of an imature spermatid into a mature spermatozoon occurs; during the process the round spermatid, derived from a secondary spermatocyte by meiotic division II, forms an elongated spermatid and then transforms into a mature spermatozoon by …
At which stage of spermatogenesis is the number of chromosomes reduced to half?
Meiosis II resembles a mitotic division, except that the chromosome number has been reduced by half. Thus, the products of meiosis II are four haploid cells that contain a single copy of each chromosome. In mammals, the number of viable gametes obtained from meiosis differs between males and females.
Which of the following changes occurs during spermiogenesis?
During spermiogenesis, spermatids undergo specific morphological and functional modifications which involve nuclear elongation, chromatin condensation, acrosomal formation and tail development.
Which stage of spermatogenesis is transported to epididymis?
During spermiogenesis, spermatids are transformed into spermatozoa (formed sperm). Upon release from the seminiferous tubules, sperm are moved to the epididymis where they continue to mature.
How does differentiation occur in spermatogenesis?
Spermatogenesis is an ongoing differentiation process that occurs in the seminiferous epithelium in the testis in males to produce spermatozoa (sperm) and is sustained by a tissue-specific stem cell termed the “spermatogonial stem cell.”
What are the diploid stages in spermatogenesis?
Spermatogenesis involves (1) a proliferative phase as spermatogonia divide to replace their number (self-renewal) or differentiate into daughter cells that become mature gametes; (2)a meiotic phase when germ cells undergo a reduction division, resulting in haploid (half the normal DNA complement) spermatids; and (3)a …
Where in the human male does spermatogenesis occur quizlet?
Spermatogenesis takes place within several structures of the male reproductive system. The initial stages occur within the testes and progress to the epididymis where the developing gametes mature and are stored until ejaculation.