What would you like to do?
What is the difference between spermatogenesis and oogenesis?
- Spermatogenesis takes place in the testes of males, oogenesis takes place in the ovary of the females.
- Spermatogenesis produces small, motile spermatozoa whereas in oogenesis the ovum is spherical, not motile and is much larger with more food reserves and cytoplasm.
- Spermatogenesis involves a metamorphosis stage called spermiogenesis, in oogenesis there is no metamorphosis stage.
- In spermatogenesis, 4 gametes are produced from each meiotic division, whereas in oogenesis there is only 1 gamete produced from each division as the unequal cytokinesis leads to the formation of polar bodies.
- Spermatogenesis occurs in males (human males) continuously from
puberty to death whereas oogenesis starts in females in the fetal
period. It takes 70 days for sperm to be produced in males.
- In oogenesis, the development of the oocyte is arrested at prophase I of meiosis until puberty, and then stops at metaphase II of meiosis until fertilization, where the meiotic division is finally completed. In males meiosis occurs continuously
- The hormones in the 2 processes have different effects - in oogenesis, FSH is responsible for the choice of the primary oocyte and causes the cells of the membrana granulosa to proliferate to form the theca interna which secretes oestrogen, and the theca externa. LH in females stimulates ovulation and the maturation of the Graafian follicle. In males, on the other hand, FSH increases the activity of the Sertoli cells which are involved in spermiogenesis (the metamorphosis stage of spermatogenesis). LH in males stimulates the Leydig cells to secrete testosterone.
Was this answer useful?
Thanks for the feedback!
Answer Oogenesis or rarely oögenesis is the creation of an ovum (egg cell). In mammals, oogenesis occurs in the ovarian follicle of the ovary. …Oogonial transformation into oocytes (oocytogenesis) is completed either before or shortly after birth. Further development comes to a rest during prometaphase I of meiosis, known as the dictyate stage, until puberty triggers oogenesis. In ascaris, the oocyte does not even begin meiosis until the sperm touches it. Oogenesis is the process in which the primary oocyte turns to an ovum undergoing meiosis. At first there is a diploid oocyte called the primary oocyte. Meiosis I occurs in which synapsis occurs and tetrads form and crossing over as well and this becomes the secondary oocyte and the first polar body. The haploid secondary oocyte undergoes meiosis II forming an ootid and another polar body. The first polar body also undergoes meiosis II forming two more polar bodies for a total of three. All three polar bodies at the end of Meiosis II disintegrate leaving only the ootid which undergoes maturation and eventually matures into an ovum. It is interesting to note that such an important process in animal life cycles is done completely without the aid of spindle-coordinating centrosomes. Many protists produce egg cells in structures termed archegonia. Some algae and the oomycetes produce eggs in oogonia. In the brown alga Fucus, all four egg cells survive oogenesis, which is an exception to the rule that generally only one product of female meiosis survives to maturity. In plants, oogenesis occurs inside the female gametophyte via mitosis. In many plants such as bryophytes, ferns, and gymnosperms, egg cells are formed in archegonia. In flowering plants, the female gametophyte has been reduced to an eight-celled embryo sac within the ovule inside the ovary of the flower. Oogenesis occurs within the embryo sac and leads to the formation of a single egg cell per ovule.
Spermatogenesis is the development of mature spermatozoa (sperm cells) from spermatogonia; it includes spermatocytogenesis and spermiogenesis. In the testes there are seminif…erous tubulesSeminiferous tubule surrounded by epitheliumOn epithelium are SPERMATOGONIA cellsThese are diploid cellsDivide by mitosisSome remain in epithelium as more spermatogoniaHowever, some move towards middle of tubuleThey grow larger and are now called PRIMARY SPERMATOCYTESThey undergo meiosis I to createSECONDARY SPERMATOCYTES which are haploid2-3 days later meiosis II occurs to createSPERMATIDSThese begin to differentiateThey are enveloped by the Sertoli Cells and undergo SPERMIOGENESISThis gives them their characteristic shape from a round cell to the head and elongated tail. The cytoplasm is remodeled. This createsSPERMATOZOA Note: The production of egg cells, the female counterpart to spermatogenesis, is called oogenesis.
Oogenesis and spermatogenesis differ in how many cells are formed. Oogenesis forms 4 eggs but only 1 is viable, while spermatogenesis forms 4 viable sperm cells.
Spermatiogenesis is the process of producing sperm and oogenesis is the process of producing egg cells. fertilization
There is a primary difference between spermatogenesis and oogenesis. The latter gives more cytoplasm to the oocyte while the spermatosis divides it.
Oogenesis is the formation of egg cells or ova. Spermatogenesis, on the other hand, is the meiosis that forms sperms. The difference of the two are the genders wherein the…se occurs to.
Meiosis, the process by which gametes are formed, can also be called gametogenesis, literally "creation of gametes." The specific type of meiosis that forms sperm is cal…led spermatogenesis, while the formation of egg cells, or ova, is called oogenesis. The most important thing you need to remember about both processes is that they occur through meiosis, but there are a few specific distinctions between them. Spermatogenesis The male testes have tiny tubules containing diploid cells called spermatogonium that mature to become sperm. The basic function of spermatogenesis is to turn each one of the diploid spermatogonium into four haploid sperm cells. This quadrupling is accomplished through the meiotic cell division detailed in the last section. During interphase before meiosis I, the spermatogonium's 46 single chromosomes are replicated to form 46 pairs of sister chromatids, which then exchange genetic material through synapsis before the first meiotic division. In meiosis II, the two daughter cells go through a second division to yield four cells containing a unique set of 23 single chromosomes that ultimately mature into four sperm cells. Starting at puberty, a male will produce literally millions of sperm every single day for the rest of his life.Oogenesis Just like spermatogenesis, oogenesis involves the formation of haploid cells from an original diploid cell, called a primary oocyte, through meiosis. The female ovaries contain the primary oocytes. There are two major differences between the male and female production of gametes. First of all, oogenesis only leads to the production of one final ovum, or egg cell, from each primary oocyte (in contrast to the four sperm that are generated from every spermatogonium). Of the four daughter cells that are produced when the primary oocyte divides meiotically, three come out much smaller than the fourth. These smaller cells, called polar bodies, eventually disintegrate, leaving only the larger ovum as the final product of oogenesis. The production of one egg cell via oogenesis normally occurs only once a month, from puberty to menopause.
meiosis is the process; males produce four haploid gametes (sperm) while in females only a single haploid gamete (egg) is produced. The other three cells (polar bodies) fail t…o mature and die.
Oogenesis is the formation of the ovum, and spermatogenesis is the formation of the sperm. These two processes are similar as they are both formed by meiosis, (reduction divis…ion). Meiosis is the process of cell division where one mother cell will create four daughter cells with half the amount of genetic information. Or in other words, oogenesis and spermatogenesis are creating gametes.
Spermiogenesis is a stage of spermatogenesis where spermatids are transformed into spermatozoa.
They are both processes of creating gametes. The products are haploid
I'm not going to get into the details, but simply... spermatogenesis produces sperm (only occurs in males) and oogenesis produces the egg (only occurs in females).
Spermiogenesis is a stage of Spermatogenesis where spermatids are transformed into spermatozoa.
When compared with the number of gametes produced from a single primary sex cell during oogenesis the number of gametes produced from a single hman primary sex cell during spermatogenesis is usually w?
four times as great
What evidence suggest that Down syndrome is more often the result of non-disjunction during oogenesis rather than during spermatogenesis?
One decent piece of evidence is that the incidence of newborns with Down's increases exponentially with the age of the mother. Once a woman reaches 45 years of age the chance …of her having a child with Down's becomes 1:30, as opposed to 1:1667 if the woman is 20. No correlation like this has been found in the age of the father. The increase in the incidence of Down's with mothers age is likely because all of the eggs a female has are with her from birth. They are trapped in one of the stages of the cell cycle (prophase 1 of meiosis). The longer the woman waits before becoming pregnant the older of an egg cell she is using. These older cells have been trapped in prophase 1 for many years. This, in some way, leads to an increase in the rate of non-dysjunction events (failure of 2 chromosomes to separate) and thus, an increase in trisomy 21.
In spermatogenesis, the number of spermatozoa formed from one secondary spermatocyte are FOUR. Whereas In oogenesis, Only ONE Definitive Ovum is produced from Secondary oo…cyte and three polar bodies are formed which are later degenerated.