chromatid [arm(s) of chromosome] is related to DNA
i am looking for the relation..
i got different relations in different books
for example: 1 chromatid=1 dna , 2 chromatid=1 dna etc...
please specify the correct answer..
thank you.
i am looking for the relation..
i got different relations in different books
for example: 1 chromatid=1 dna , 2 chromatid=1 dna etc...
please specify the correct answer..
thank you.
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Okay. DNA in eukaroyotes is split into chromosomes. One chromosome has different DNA than another chromosome. There are 46 chromosomes.
In replication, the chromosome is replicated to build an identical sister, and they are bound together at their midpoint (known as the kinetichore). When they are bound like this they are known as sister CHROMATIDS. Again, they are genetically identical. They have the same DNA, thus your book may refer to them as '1 DNA' or whatever it really says.
In replication, the chromosome is replicated to build an identical sister, and they are bound together at their midpoint (known as the kinetichore). When they are bound like this they are known as sister CHROMATIDS. Again, they are genetically identical. They have the same DNA, thus your book may refer to them as '1 DNA' or whatever it really says.
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This can be a confusing concept to grasp at first.
Your DNA is organized into 46 chromosomes. Each cell only has one copy of DNA.
When your DNA is copied each chromosome consists of two chromatids (looks like an X, two long arms).
During mitosis each chromosome (consisting of two chromatids) will split so each new cell contains one copy.
Here comes the confusing part. Each new cell will consist of 46 chromosomes, an exact replica of the original cell. These 46 chromosomes only contain one arm (looks like an l). This is also called a chromatid.
So the thing to remember is that a chromatid is each individual arm, and a chromosome can either be one chromatid, or two joined chromatids.
Your DNA is organized into 46 chromosomes. Each cell only has one copy of DNA.
When your DNA is copied each chromosome consists of two chromatids (looks like an X, two long arms).
During mitosis each chromosome (consisting of two chromatids) will split so each new cell contains one copy.
Here comes the confusing part. Each new cell will consist of 46 chromosomes, an exact replica of the original cell. These 46 chromosomes only contain one arm (looks like an l). This is also called a chromatid.
So the thing to remember is that a chromatid is each individual arm, and a chromosome can either be one chromatid, or two joined chromatids.