I know that they're in each cell. Every cell has the same amount, and that makes us human.
And they why we can't be bred by..giraffes! lol and same for different animal speicies! lol
am i right?
i remember we have 24....am i right on that, too?
thanx!
2007-08-11 16:43:32 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Biology
No, every human has 46 chromosomes. The chromosomes are in pairs of two and and there are 23 pairs. every sex cell (egg, sperm) has 23 chromosomes making them haploid, meaning that they have only 1 set of 23 chromosomes, but at conception the chromosomes pair up, making them into 46.
every chromosome pairs up with its identical "twin: meaning that they are simular in size shape an position
22 sets of the chromosomes are called autosomes, which are different forms of a particualr gene, but the 23 pair are the sec chromosomes, that determine if it is going to be a girl or a boy, for the female it is XX for the male it is XY.
as for other animals im not exactly sure
2007-08-11 17:04:08 · answer #1 · answered by SHERRY B 1 · 1⤊ 1⤋
Humans have 46 chromosomes in all their cells, except sperms and ovules which have 23 each. That is why when sperm and ovules combine they generate a 46 chromosomed human baby.
Same is the reason, why giraffes cannot breed humans.
The chromosomes are placed inside the nucleus of the cell and on each is layered with the DNA. I am not sure about the DNA thing.
2007-08-11 23:54:11 · answer #2 · answered by Hell's Angel 3 · 1⤊ 1⤋
The typical number of chromosomes in a human cell is 46 - two pairs of 23 - holding an estimated 25,000 genes. One set of 23 chromosomes is inherited from the biological mother (from the egg), and the other set is inherited from the biological father (from the sperm).
2007-08-11 23:51:11 · answer #3 · answered by Kylie J 4 · 1⤊ 0⤋
Humans have 23 pairs of chromosomes (46 chromosomes total) in the diploid cells (basically the cells that aren't sperm or egg cells).
Different species generally can't interbreed because the chromosome numbers are different and the chromosomes can't line up during meiosis to produce viable gametes (egg or sperm cells) and can't line up during mitosis to produce viable daughter cells.
2007-08-11 23:50:39 · answer #4 · answered by N E 7 · 1⤊ 1⤋
There are 46 chromosomes in each cell, 23 pair of genes. Sex cells have 23
2007-08-11 23:50:26 · answer #5 · answered by Shortstuff13 7 · 1⤊ 1⤋
Don't bet on it. Human cells have 46 (23 pairs); eggs and sperm have 23.
2007-08-11 23:48:04 · answer #6 · answered by cattbarf 7 · 2⤊ 1⤋
We have thousands or even million of chromosomes. 23 in each nucleated cell of our bodies.
If we are pregnant we have another set in every cell of the chill and billions of non human chromosomes in the multitude of microorganisms that we host every day.
There are 24 chromosomes but we each get 23 leaving out the x or y depending upon sex.
Cattbarf is right we have pairs in every cell unless we are haploid or diploid (hate it when that happens)
2007-08-11 23:47:08 · answer #7 · answered by Anonymous · 0⤊ 3⤋
even if we had the same amount as an animal it wouldn't work. the sperm wouldn't be taken in by the egg.
2007-08-12 00:09:18 · answer #8 · answered by Anonymous · 1⤊ 1⤋
I thought it was 26 . . . or 13 pairs equaling to.
yeah . . . I figured I was wrong! ;p
2007-08-11 23:47:26 · answer #9 · answered by LuLu 6 · 0⤊ 3⤋