Why should the cells that are produced be identical to the parent cell in mitosis but not in meiosis?

In Meiosis - cells created are called Gametes (sex cells -i.e. Sperm/Egg). They are to ensure variation in the result of fertilization. The offspring formed carries a mixture of chromosomes (and therefore genes + DNA) from both parents.


Mitosis occurs in every other part of the body except the reproductive system (so therefore no fertilization occurs, nor do you get any variation of genetic information IN the cells). Cells formed are to ensure that each new cell carries the same set of information throughout the whole body of the organism.





Why the difference?


Mitosis is concerning YOUR body. Each cell functions to help YOU survive as proteins are synthesized from cells in your body (more specifically, Proteins are made from mRNA which is made from DNA). To do this, you need to make sure your DNA is kept the SAME through your whole body! Also, whenever cells are damaged or lost - new cells MUST replace them by containing the same information in them!





Meiosis results in the production of gametes for reproduction. To ensure survival of offspring, the chromosomes in each gamete (male and female) are different. This is to make sure that each offspring is different (i.e. note that brothers and sisters in a family don't look exactly the same - this is EXCLUDING TWINS). Differences in offspring allow them to have different characteristics like height, eye color ... etc.Why should the cells that are produced be identical to the parent cell in mitosis but not in meiosis?
When cells divide by mitosis, each chromosome splits into two individual chromatids which then regenerate in the daughter cells. Meiosis involves the joining of two gametes to form a zygote. Chromasomes in each gamete come from non-identical parent cells, ie a spermatozoa and an ovum.Why should the cells that are produced be identical to the parent cell in mitosis but not in meiosis?
mitosis: it is the cell reproduction WITHOUT the overlapping of different chromosomes from different person..example is the replacement of the dead skin cells...so why would it produce a diff cell? knowing that is is gotten from yours and yours only.....





meosis: in this, we produce gametes(egg cells or sperm cells) and each gametes is only haploid( half the number of its parent cell) thus it is not identical to its parent cell..





good luck!

mascara