what is gametes in DNA?

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steelcat
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what is gametes in DNA?

Post by steelcat » Mon Aug 24, 2009 9:50 pm

what is gametes in DNA?

and is the following comment correct?
"if you could figure out a way to insert an extra gene for it into gametes, then all cells of an individual would carry it."

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biohazard
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Post by biohazard » Tue Aug 25, 2009 6:08 am

(In humans) a gamete is a cell that has only one set of chromosome (haploid cell) instead of the common two sets (diploid cells), which makes it possible for this cell to fuse with another gamete in fertilization to form the first diploid cell of the embryo-to-be - i.e. gametes are sperm and eggs.

Now, if you think about human fertilization and embryonal development, you should be able to figure out what happens to a new gene if you put it into a gamete, which then forms the first diploid cell of a new individual and starts dividing.

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Re: what is gametes in DNA?

Post by bobc2 » Fri Sep 04, 2009 7:44 pm

If you insert a new gene, is it necessary to replace another gene with it? That is, does DNA have a fixed number of genes, such that the specific number of genes must be maintained--otherwise the DNA would be defective? Do both gamete mates necessarily have the same number of genes? And the same number of nucleotides in the DNA molecule?

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canalon
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Re: what is gametes in DNA?

Post by canalon » Sat Sep 05, 2009 2:03 am

bobc2 wrote:If you insert a new gene, is it necessary to replace another gene with it? That is, does DNA have a fixed number of genes, such that the specific number of genes must be maintained--otherwise the DNA would be defective? Do both gamete mates necessarily have the same number of genes? And the same number of nucleotides in the DNA molecule?


No. To all questions.
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