what is the life span of a sperm cell and egg cell?
967074
Egg / ovum -- 48 hrs\nSPerms -- 48-72 hrs
578283
This is when a cell reproduces by either mitosis (in most cases) or meiosis (in the case of sex cells)\n\nSee http://www.scienceaid.co.uk/celldivision.html for more information
916206
Mitosis is a continuous process by which the body grows and dead body cells are replaced, in this type of cell division each "daughter cell " contains  the exact number of chromosomes as the "parent cell" 46 also called the diploid number. The process of mitosis  in sperm is called spermatogenesis  and in the ovum , called oogenesis.\nMeiosis is a different type of cell division where reproductive cells undergo 2 sequential divisions. During meiosis the number of chromosomes is reduced to half, 23 chromosomes also called the haploid number. At the moment of fertilization (when the sperm and ovum unite) the new cell contains 23 chromosomes from the sperm and 23 chromosomes from the ova returning to the diploid number of 46 and both the mothers and fathers traits are inherited by the gamete
881311
sexual..eggs and sperm\nasexual..fission and cell splitting
823911
Fertilization of an egg with sperm can occur in vitro (in a test tube). Under proper conditions, a blastocyst will form after about 5 days. The blastocyst contains a group of cells called the inner cell mass. These cells are pluripotent, meaning they can differentiate into any cell in the human body. These are commonly referred to as "embryotic stem cells".
336535
Total life span=8billon+yrs.\nIt may last for another 4.5 billion years.....(and counting)
777949
Remember that meiosis is the formation of gametes from germ cells.  Our bodies begin the process of making germ cells very early in our development, and the precursors to sperm/egg cells are in tact well before puberty.  When a woman ovulates, at the end, four of these egg cells complete the maturity stage in each cycle, but only one survives to become an ovulated egg (accompanied by 3 polar bodies).  This egg (and its complement sperm) have ONE set of chromosomes each, and upon fertilization, the zygote will have 2 copies of every chromosome, one from the sperm, and one from the egg.
865378
only sperm cell has flagellum.the sperm cell and egg cell r haploid in condition and r produced by the process called meiosis or reduction division
696921
Meiosis is the type of cell division by which germ cells (eggs and sperm) are produced. Meiosis involves a reduction in the amount of genetic material
108459
An egg, and a sperm both contain a nucleus which holds half of our DNA (23 chromosomes). All of our other cells contain 46 Chromosomes. In the lab, they harvest an egg from which ever species they are cloning, and they remove the nucleus. They can then take the nucleus of a normal 46 chromosome cell and put it inside the egg- where it's nucleus used to be. The egg then "thinks" it is fertilized and will start to divide, and grow. This embryo is an exact replica of the parent cell. Cloning is a form of asexual reproduction, because sex was not involved in the creation of the new embryo. There are many ethical issues surrounding cloning. Some argue that scientists are "playing God" because they are creating new life. Some say that if a human were to be cloned- it would have no soul because it was not created by God. There are too many ethical issues to type here, but you get the idea. You'll have to decide for yourself where you stand. Hope this helps. good luck in school
511812
Yes, the rhythm method isn't that reliable.  Sperm can stay in the body for as long as 5 days and ovulation can be irregular for numerous reasons, including stress.
921540
It's different for each tissue in the body... some examples are: epithelial (skin) cells: 1 month, or neurons (brain cells) : 50 years.
1026539
If dehydration is not a factor, about 4 to 6 hours at room temperature.\n\nHowever, unless you are "spilling seed" in a greenhouse, dehydration will be a factor. In this case, the semen begins to dry up and crystallize; the sperm cell's lifespan is 1 to 3 hours, in this case.\n\nBoth of these examples assume that we are discussing human sperm and semen. Have a great day!
846383
Sperm and ova are unfertilized gametes with 1 set of chromosomes, therefore known as haploid cells (n). They combine to form the fertilized cell, zygote, which is a diploid cell (2n) with 46 chromosomes. Meiosis is the process that halves the chromosomes numbers and fertilization is the process that restores it.
630962
Human egg is called an Ovum. Please check the below link:\n\nhttp://www.womenshealthmatters.ca/Centres/sex/femalebody/men_stages.html
551447
Cell division or Mitosis is how your body replaces worn out cells.  All cells degrade over time, and if your body could not replace them, then you wouldn't live very long.  Partial cell division, or Meiosis(sp) is necessary for reproduction
1180820
Sperm can get into the fallopian tubes within 5 minutes after ejaculation, but it can take up to an hour. But the first sperm usually cannot fertilize the egg. It takes sperm many hours inside the cervix, uterus, or fallopian tubes before it's ready to fertilize the egg, this is called capacitation. During capacitation, the outside of the sperm is prepared for entry into the egg.