disease caused by meiosis?

Question

please tell me the term used to explain what happened causing that disease

kindly help! :)

Answer 1

There are chromosomal disorders caused by something called meiotic nondisjunction, wherein either the mother's or the father's gamete carries either an extra copy or no copies of a particular chromosome. A common example is Down syndrome (aka trisomy 21), usually caused when an ovum carrying two copies of the 21st chromosome is fertilized by a normal sperm. Other examples of trisomies like this would include trisomy 13 and trisomy 18. It can also happen with the sex chromosomes; sometimes an egg or sperm lacking a sex chromosome will fertilize an egg or sperm carrying an X, and this zygote will survive to become a female with Turner syndrome (aka monosomy X). It is also possible for a zygote to wind up with three or sometimes even four X chromosomes, and if there is any Y chromosome involved that produces different syndromes. Klinefelter's syndrome is the condition where a male has an extra X (XXY instead of the normal XY).

Answer 2

Normally, meiosis is not a cause of disease. Meiosis is one of two types of cell division (the other being mitosis). Mitosis creates two cells from one, each of which has the normal two copies of each chromosome. Meiosis, on the other hand, creates two cells from one, but each of the two new cells only has one copy of each chromosome.

The only cells that are the result of meiosis are essentially, egg and sperm cells. Thus, when the egg and sperm combine, the normal two copies of each chromosome is restored. If there are problems with meiosis, then the resulting egg or sperm cells could have genetic defects (gains or losses of chromosomes, other mutations).

So back to diseases... There are hundred of so-called "genetic disorders" in which a developing embryo is affected by genetic defects. But I am not aware of research that proves that any of these genetic disorders is specifically (or typically) the result of problems with meiosis (although one would guess than many probably are...).

Hopefully that helps.

Answer 3

mental or growth retardation (down syndrome) is caused by a mistake in meiosis. When meiosis occurs, sometimes, it doesn't copy or synthesize right, so they end up with extra copies. It is not genetic. Most genetic traits are passed on my the mtDNA through the mother only.

Examples of genetic traits are sickle cell anemia and parkinson's disease.

Answer 4

"then the resulting egg or sperm cells could have genetic defects (gains or losses of chromosomes, other mutations). "

This is right, but you have to note that genetics and heredity are two different things. What happens during meiosis doesn't get passed on to offspring generally.

They just end up getting the disease, and the mother is usually the carrier of them.

Answer 5

Meiosis is something that happens with cell production... not a disease.
ALD, Down's Syndrome, Sickle Cell Anemia are disease that have to do with # of chromosomes or genetic defects passed on b/c of defective cells.........

Answer 6

I have no idea. Maybe it's just a deformality of some sort. Sometimes meoisis can cause retardation, I heard, because of the extra chromosome number.

Answer 7

It's Down Syndrome.