How much do you know about sperm cells? You know guys make a lot of them--but how many? You know they're small--but how small? You know sperm cells swim their way to an egg cell--but with no brains, how in the heck do they know which way to go? See, men and women, there's a lot about sperm you just don't know. Lucky for you, we've found answers to nine big questions about the amazing little wrigglers.
Sexy Swimmers: 7 Facts About Sperm
Indian sperm costs up to Rs 10, - Times of India
During meiosis, segments of nonsister chromatids can trade places. This recombination of maternal and paternal genetic material is a key feature of meiosis. During what phase of meiosis does recombination occur? Which of the following reduces circulating blood levels of follicle-stimulating hormone FSH when the sperm count is high? Why does only one egg, rather than four eggs, develop during oogenesis, given that spermatogenesis results in four sperm formed from one stem cell? Actually, gametogenesis oogenesis in the female and spermatogenesis in the male produces four eggs and four sperm. The unequal cytoplasmic division that results in one egg and three polar bodies ensures that a fertilized egg has ample nutrients for its journey to the uterus.
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Sperm is the male reproductive cell. In the types of sexual reproduction known as anisogamy and its subtype oogamy , there is a marked difference in the size of the gametes with the smaller one being termed the "male" or sperm cell. A uniflagellar sperm cell that is motile is referred to as a spermatozoon , whereas a non-motile sperm cell is referred to as a spermatium.
Please refresh the page and retry. One such condition that seems to be worsening is male infertility. The latest findings, from researchers at Aarhus University in The Netherlands, found than men who are hoping to become fathers should go to bed before And if you thought that cutting a few painkillers from your day to day will solve any fertility woes you may be suffering from, think again.