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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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rjcool123 rjcool123
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11 years ago
I'm learning about reproduction, DNA, cell division, blah blah blah, and I don't understand the difference between a chromosome and a chromatid. What is the difference?
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#1
11 years ago
a chromatid is a copy of the chromosome when its reproducting. when the 2 chromosomes are joined together at the centromere, thats a chromatid. otherwise, it's called a chromosome when it's by itself and not reproducing.

if this helps, plz vote for best answer(:
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#2
11 years ago
You know how a chromosome is X-shaped? It's more like a > and < combined to make an X if you can imagine that. A > is one chromatid (a bent-line shaped rod of genetic material), and a < is the other. They are combined in the middle to make the chromosome. The chromosome is the entire X...both the > and <.

If you didn't get my explanation with the > and <, it's just that >< looks like an X and its made up of a greater than sign and less than sign. .
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#3
11 years ago
A chromatid is half of a chromosome. If you look at the structure of a chromosome it is two pieces connected by a centrosome. One piece of the chromosome is referred to as a chromatid. So during Mitosis or Meiosis when the chromosome splits the chromatids are what migrate to the opposite ends of the cell.   Wink Face
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