biology mitosis and meiosis
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Answers:1) Meiosis gives you total of 4 daughter cells in male and only one in females. Meiosis the daughter cells are haploid 23(n). Crossing over of genes occur. Mitosis gives you to identical daughter cells with diploid number 46(n). 2) Because they have 23 chromosomes from dad and 23 from mom. 3) Because other wise each zygote have 92 chromosomes. 4) creation of an ovum (egg cell). It is the female process of gametogenesis. It involves the various stages of immature ova. spermatogenesis is the male version of gametogenesis. 5)I guess the main problem would be that many of them don't stick and the procedure is very expensive. 6)Well internal fertilization doesnot cost 25000$. Other then that Zygote has more chance of survival? 7) Asexual is clone of the thing, while sexual is natural selection. 8) The unequal cytokinesis that occurs has the advantage of providing the ovum with a much greater amount of cytoplasm and stored food than if an equal division were to occur. Hope this helps!
Answers:There are three differences between what Mitosis accomplishes and what Meiosis accomplishes. A. Mitosis divides one nucleus into two; Meiosis divides one nucleus into four. B. Mitosis conserves chromosome number; Meiosis reduces it in half (usually from diploid [46 in humans] to haploid  ). C. Mitosis produces genetically identical daughter nuclei; Meiosis produces genetically different daughter nuclei.
Answers:Alright, so I can answer a few of your questions, but you'll have to research some of these also. 1) The main difference between Mitosis and Meiosis is the way the genes are passed on. Mitosis is the process where a cell will divide with itself; like your skin's cells. Your epithelial cells divide themselves to produce more skin cells. The important thing here is the identical genetic code is passed on from cell to cell. Now Meiosis involves sexual reproduction. In meiosis the cell only has half the genetic code because it must join with another cell. For instance, sperm has half the genetic code of a normal cell because it must fertilize an egg. 2) Meiosis takes place during sexual intercourse; because both of the cells coming together only have 1/2 of their genetic code, the mixing allows for mutations to occur. 3) Mitosis happens at different times depending on what part of the body your at. For instance, your skin's cells are constantly dividing, thus mitosis occurs throughout the day on your skin. However, neurons only go through mitosis at the start of life since they do multiply later in life. 4) Alright so PMAT is basically the steps a cell goes through in mitosis and meiosis. PMAT2 is the steps that a cell goes through when in meiosis. Basically a cell going through meiosis will go through PMAT and then PMAT2 to produce gametes (eggs and sperm). 5) PMAT occurs at different times depending on the tissue. It really comes down to the genes in the nucleus which tell the cell to divide. PMAT2 however occurs after PMAT has happened in a cell going through meiosis. Whew, remember to research all this for yourself, it's been about a year since I studied this in my biology classes. Good luck on your test!