There are three differences between male and female meiosis. The first difference should be obvious. Male meiosis creates sperm, while female meiosis creates eggs. The second difference is related to the first. Male meiosis takes place in the testicles, while female meiosis takes place in the ovaries.
The last difference is more subtle and requires an understanding of sex chromosomes. For the most part, each human's DNA is made up of forty-six chromosomes, twenty three from each parent (victims of Down's Syndrome are exceptions). Of these forty-six chromosomes, two are known as sex chromosomes because they determine the sex of the individual. A male will generally have one X and one Y chromosome, while a female will in all but rare incidences have two X chromosomes, however only one of the two is active. A process of masking of the second X chromosome results in production at approximately the 1000 cell stage of embryological development of what is known as a Barr body which has been assumed to be entirely inactive, although recent research suggests Barr bodies may have a greater influence than previously supposed. During meiosis I, the sex chromosomes separate and enter different sperm or egg cells (gametes). Males will end up with one half X sperm and the other half Y sperm, while females will all have X eggs because they had no Y chromosome in the first place. There are more subtle differences though. At the end of meiosis I females have two daughter cells and meiosis II only occurs if and when fertilization occurs by a sperm cell. At that time both daughter cells divide to form 4 cells and of the 4 cells formed, 3 are discarded as polar bodies and the 4th cell having an enhanced cytoplasmic component combines its nuclear component with the sperm cell's nuclear component and crossing over occurs to form the embryo which then begins to divide via mitosis to become two cells, then four and so on. An egg cell that is not fertilized is ovulated as a pair of daughter cells and there is no formation of polar bodies, hence, the eggs that are ultimately discarded at menstruation are not "finished" eggs. They have not undergone meiosis II. Yet another distinction is that meiosis in females is interrupted. Of the 7 million potential oocytes that form during the 5th month of pregnancy, 99.9% will be eliminated prior to being ovulated and these are resorbed by the body. Potential oocytes remain in a latency phase until hormones released at puberty result in oocytes going through meiosis I and being ripened individually and released on a monthly basis. Without fertilization by a sperm making its way to the fallopian tube, meiosis II will not occur and the spent egg released will have two identical daughter cells. In males, meiosis does not begin until puberty and once initiated, a 74 hour cycle occurs with several hundred million sperm cells being produced daily with no similar selection process involving polar bodies or daughter cells. Meiosis in females ends at menopause when all of the primary oocytes have been either ovulated or absorbed. Meiosis in males is a lifetime endeavor and while sperm production decreases after reaching a peak in the mid 20's and the percentage of sperm that swim erratically increases with age, a healthy human male will continue manufacturing sperm from puberty until death. When a sperm and an egg fuse, the chromosomes pair and recombine. If the combination is XY, a male is produced. If the combination is XX, a female is created but again, there are complications. When the 22 autosomal chromosomes (non sex chromosomes) cross-over, a good deal of recombination occurs, but the Y chromosome has 95% of its information conserved that fails to recombine with the X chromosome. It is believed that the Y chromosome "hijacked" the sex-determining region or SRY locus some 300 million years ago, although Dawkins suggests the ancestral "Adam" goes back only 60,000 years in humans and was predated (sic) by an ancestral "Eve" 140,000 years ago (see "population bottleneck", also a wikipedia contribution having related links). As a result, males produce both X and Y factors in their testes which are intitiated when the SRY locus received from their father results in the expression of a protein called TDF (testis determining factor) resulting in a developing embryo manufacturing seminiferous tubules, testes and a penis. Hence, all embryos start out females and only become males with the expression of genes on the SRY locus occurs (with the SRY and 18 other genes not being found on the X or any of the other autosomal chromosomes). All mammals except the platypus have the SRY locus form of sex determination (whereas birds have the WZ sex inheritance system). In cases where the SRY locus gets translocated to an X chromosome, a female (xx) can develop seminiferous tubules, testes and a penis with these individuals said to have xx male syndrome, however, such individuals are sterile although could possibly become pregnant given in-vitro fertilization and hormonal supplements.
1-2% the same difference between female humans and female chimpanzes
There is no difference, mitosis is the division of cells for the repair of damages areas, or growth, meiosis is different in male and females, mitosis isnt. Sources: An A in biology class
Meiosis and mitosis are the two processes through which cells reproduce and divide, but they don't work the same way. Mitosis occurs in cells of all living organisms, whereas meiosis occurs only in humans, animals, plants and fungi. The main difference between these two processes is that Mitosis' function is repairing and general growth of the body, and Meiosis' function is genetic diversity, because that's the way male and female sex cells are created.
ughh, one is a pig and one is a human. Are you stupid?
humans talk, phones answer.
The difference between fetal pigs and humans systems is actually not that big. The humans are bigger than fetal pigs.
The male has an extra leg in between his back two. The females are ridden by both humans and male horses.
how to tell the difference between lighting bugs in male and female isMale has no red but so tiny we humans can't see Female has red dots in its black skin and we can see is
Cats do not have appendix and humans do.
the difference is the human one is for humans and the chicken one is for chickens. We humans eat chicken.....".........'........'..........lawls
Meiosis produce haploid cells.So meiosis is used to produce sperms and ova.
Meiosis is the division of the sex cells (sperm and egg). Meiosis produces gametes with one half the number of chromosomes as the parent cell. A female gamete and male gamete will then undergo fertilization and create a zygote. (not limited to just humans, meiosis occurs in sexually reproducing organisms).
No, the chromosomal difference between cattle and humans would prevent a human female from conceiving a fetus with a bovine male.
are protozoa and amoeba the same
Humans are a subset of the bigger Group mammals.
Humans are more complex organisms.
In humans and most (if not all) other eukaryote species, males have the karyotype XY in their chromosomes, and females have the genotype XX.
both are female reproductive cell. But You can only find ovule in plant seeds while you can find ovum in animals and humans.
Vinegar is an acid liquid substance. Milk is a liquid to drink made inside a female of most animals including humans.
the similarities is that they both are the prossess of making cells. the difference is that mitosis makes regular cells with for humans 46 chromosomes, and meiosis is making reproductive cells which for humans have half the chromosomes so they have 23 chromosomes. how i remember this is that for meiosis it sounds like it's missing the T so its missing half the chromosomes.
Meiosis takes place in the gamete cells of humans. In human males meiosis takes place in the sperm cells, in human females it takes place in the ovum.
Meiosis is a normal biological process in humans. It does not cause STDs.
humans cells contain dna, but the cell of archaea do not
The difference is about 1.9% between humans and chimps.
Meiosis differ among humans and alligators because the number of chromosomes that is given from the parents.