How many pairs of chromosones does a normal human have?
113120
23(twenty-three) pairs of chromosomes in the human body.Unless of course there is a mutation..
214313
I sure do. There are basically 4 different types of chromosomal mutations:  deletions, duplications (both of which are caused by nondisjunction), inversions (a piece of the chromosome breaks off, rotates 180 degrees and then reattaches), and translocation (a piece of a chromosome breaks off and reattaches to another chromosome).
349227
CHECK THE NUMBER OF CHROMOSOMES OF HUMAN, IT IS FIXED AT 48, BUT HUMAN WITH MORE OR LESS NUMBER OF CHROMSOMES TEND TO DEVELOPED OTHER PHYSICAL FEATURES THAT IS CONSIDERED ABNORMAL.OTHER ANIMALS HAVE THEIR NORMAL NUMBER OF CHROMOSOMES THAT INFLUENCED THEIR PHYSICAL FEATURES INCLUDING THE NUMBER OF FINGERS.
596998
A female egg has 23 chromosomes. A male sperm has 23 chromosomes. Thus, when a sperm fertilizes an egg, the embryo has 46 chromosomes. Women have two x chromosomes, whereas males have an x and a y. Each contribute one. The woman will always contribute an x. If the man contributes an x, the child will be female. If he contributes a y, the child will be male. Abnormalities can be caused by an added or subtracted part or whole of a chromosome. For example, trisomy 21, or down dyndrome, involves an extra chromosome. Kinefelter's involves a child having an xxy genotype, rather than the normal xy for a male.
279599
sex cells. they only have half the nomal number of chromosomes.
957887
Each chromosome in your body has an "identical pair"- there are two chromosomes that code for the same functions- one from your mother and one from your father.\n\nBecause they come from two sources, they are coding for the same functions, but may code differently for them (ie blue eyes as opposed to brown eyes).\n\nDuring prophase one, each chromosome duplicates into two sister chromatids joined by a centromere, and then the double stranded chromosome finds it's partner which is coding for the same thing (just came from the opposite parent), and is also double stranded.  Now you have a 4 stranded tetrad.\n\nGenetic variability comes from crossing over.  This is where the two chromatids closest together in the tetrad exchange some genetic information.\n\nFor example, two of the chromatids code for blue eyes, brown hair and shortsightedness.\nThe other two chromatids code for brown eyes, red hair and normal vision.\n\nDuring crossing over one chromatid from each pair forming the tetrad literally have ends "crossing over" and bits of information are exchanged.\n\nAfter crossing over, you have 4 chromatids with unique codings.  Using the example above, we may now have:\n-blue eyes, brown hair, shortsightedness\n-blue eyes, red hair, normal vision\n-brown eyes, brown hair, shortsightedness\n-brown eyes, red hair, normal vision\n\nWe now have genetic variability in each gamete produced from this meiotic division.
1127866
For humans, we need a 1 pair of chromosomes (#1-23).  If we didn't reduce our chromosome, the next generation would carry 2 pairs of chromosomes and that would be incompatible with life.  Our sexual cells (sperm and egg) has 1 set (not a pair of them) of chromosomes so that the set from the egg and the set from for sperm together makes a human with 1 pair of chromosomes.
653912
Realistically, none, because the chromosomes will cross over during meiosis, so none of the chromsomes will be exactly as they descended from the parents.\n\nBut if the haploid number is 6, and you pretend there's no crossing over, then there are 2^6 ways for the chromosomes to assort, and 2 of them will be 6 chromosomes from a single parent.  So that's 1 in 32, or about 3%.
780535
There are 23 pairs of chromosomes found in each cell of the body, and each contain genes that determine our coloring, our features, and our sex. Women inherit two X chromosomes -- one from each parent, written 46,XX.  Men inherit an X chromosome from their mothers and a Y chromosome from their fathers, written 46,XY.  Some individuals, however, have an additional X chromosome in their chromosomal arrangement, referred to as 47,XXY, or more commonly, just XXY.  The cause is unknown, yet XXY occurs in approximately 1 in every 500 to 1000 live male births, making it one of the most common chromosome variations.   The XXY variation is identified in an individual through a karyotype, a buccal smear, or FISH.
559453
GO 2 ENCARTA.COM, MAYB 21 OR 13 CHROMOSOMES EACH
1145501
Each chromosome approximately contains 500 million genetic code words. Imagine about the information in total 46 chromosomes and you can calculate the no. of pages if a page can approximately contain 500-600 words.
89268
Well haploid cells are cells that contain half the number of chromosomes present in the cell while diploid cells are cells that contain the full number of cromosomes present in that cell like in Humans there are 46chromosomes in one cell so since haploid means half the number thus it contains 23chromosomes and since diploid means full number of chromosomes then it means it contains 46chromosomes. Something to note is that haploid cells are usually reproductive cells and diploid cells are usually body cells.
245403
well, let me put it this way. meiosis creates 4 egg or sperm cells, by dividing into 4 sections the chromosomes that each person received from their parents. When you think that there are 46 total chromosomes, 23 from each parent, think how many combinations of traits are possible. Then add the possibility of genes in the chromosomes changing places. Then think that you have another parent to consider, so you need to square that number. There are a total of 36 trillion possible combinations of chromosomes, according to a class i'm taking now, for each new birth. This is only possible because of meiosis and sexual reproduction. It reshuffles the genetic cards, to avoid inbreeding and keep the gene pool healthy.
133100
Diploid and haploid are relative to what you are studying and if you are looking for exact definitions or looking for normal state.  My diploid number is 46, because I have 46 chromasomes.  MY haploid number is 23, half of the diploid.  MY sex cells, my gametes have the haploid number of 23.
153991
46, or 23 pair.\n\nThere is no average... this is the number all people have unless they have a flaw in their genetic makeup (very rare).
692724
it is possible that half of the chromosomes in an ovum are always paternal, but that is not always the case... \n\nbecause in an organism with 56 chromosomes, even if crossing-overs are not taken in consideration, there are still 268,435,456 possible combinations of the gametes. there's a chance that all chromosomes in the ovum would be paternal. there's also a chance that all chromosomes in the ovum would be maternal. and there's also chances of any other combinations in between like more maternal than paternal chromosomes, or more paternal than maternal chromosomes, or equal numbers of paternal and maternal chromosomes.
897332
26\n\nIn meiosis, the chromosome pairs are divided in half so the new cell has 1 of each.  This is because this is used to produce cells for reproduction.\n\nWhen 2 of these cells come together,they create 52 chromosomes again to create a new organism with half of each parents genetic material.