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Before a cell can divide, it must produce a new copy of each of its chromosomes, and it does this during a specific part of interphase called the DNA-synthesis phase, or S phase, of the cell-division cycle; the part of interphase preceding S phase is called Gap 1, or G1, and the part following S phase is called Gap 2, or G2. In a typical higher eucaryotic cell the S phase lasts for about 8 hours. By its end each chromosome has been replicated to produce two complete copies, which remain joined together at their centromeres until the M phase that soon follows. Chromosome duplication requires both the replication of the long DNA molecule in each chromosome and the assembly of a new set of chromosomal proteins onto the DNA to form chromatin.
(copied chromosome)
A replicated chromosome is a chromosome that has been copied during the S phase of the cell cycle, resulting in two identical sister chromatids joined at the centromere. This duplication ensures that each daughter cell receives a complete set of genetic material during cell division.
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How can you tell the difference between the original and replicated part of each chromosome?
In late anaphase and G1 of interphase, a chromosome is unreplicated and consists of a single DNA double helix. A replicated chromosome contains two identical DNA double helices.
WHEN ARE CHROMOSOME (DNA) REPLICATED?
Interphase is when DNA replication occurs. :)
What does a replicate chromosome consist of?
A replicated chromosome consists of an exact copy (assuming no mutations) of the original chromosome, which is composed of DNA and proteins called histones.
What two structures make up a single replicated chromosome?
DNA and Protein
Does chromosome replication occur in mitosis and meiosis?
Chromosome replication occurs before both mitosis and meiosis. During the S phase of the cell cycle, DNA is replicated in preparation for cell division. In mitosis, replicated chromosomes are separated into two identical daughter cells, while in meiosis, replicated chromosomes are separated twice to produce haploid gametes.
How can you tell the difference between the original and replicated part of each chromosome?
In late anaphase and G1 of interphase, a chromosome is unreplicated and consists of a single DNA double helix. A replicated chromosome contains two identical DNA double helices.
How much -in amount- is in a replicated DNA chromosome as to that in an unreplicated chromosome?
These two amounts are Equal.
When are chromosome replicated?
Interphase is when DNA replication occurs. :)
How many sections is each human chromosome replicated?
23
WHEN ARE CHROMOSOME (DNA) REPLICATED?
Interphase is when DNA replication occurs. :)
Each human chromosome is replicated in about how many sections?
Each human chromosome is typically replicated in multiple sections called replication origins. These origins are sites along the chromosome where the DNA double helix unwinds and new DNA strands are synthesized during DNA replication.
What does a replicate chromosome consist of?
A replicated chromosome consists of an exact copy (assuming no mutations) of the original chromosome, which is composed of DNA and proteins called histones.
What is the region of a chromosome holding the two double strands of replicated DNA together called?
The region of a chromosome holding the two double strands of replicated DNA together is called a centromere. The complex of DNA and protein that makes up eukaryotic chromosome is properly called chromatin.
What two structures make up a single replicated chromosome?
DNA and Protein
What does a chromosomes consists of?
A replicated chromosome consists of an exact copy (assuming no mutations) of the original chromosome, which is composed of DNA and proteins called histones.
How many chromatids does each chromosome have before S-phase?
There are two chromatids for each chromosome before the S-phase. The S-phase is wherein DNA of each chromosome is replicated.
Does chromosome replication occur in mitosis and meiosis?
Chromosome replication occurs before both mitosis and meiosis. During the S phase of the cell cycle, DNA is replicated in preparation for cell division. In mitosis, replicated chromosomes are separated into two identical daughter cells, while in meiosis, replicated chromosomes are separated twice to produce haploid gametes.
