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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.
WHEN ARE CHROMOSOME (DNA) REPLICATED?
Interphase is when DNA replication occurs. :)
What type of mutation occurs when part of a chromosome is missing after replication?
Deletion
What is an original chromosome and its copy called?
An original chromosome is called a homologous chromosome, and its copy is called a sister chromatid. Homologous chromosomes have the same genes in the same order but may have different alleles, while sister chromatids are identical copies produced during DNA replication.
What process does not occur in the chromosome between mitosis 1 and mitosis 2 that causes the chromosome number to be reduced?
Between mitosis I and mitosis II, DNA replication does not occur. This absence of DNA replication means that the chromosomes, which have already been duplicated during the S phase prior to mitosis I, do not replicate again. As a result, when the cells divide during mitosis II, they separate the sister chromatids, leading to a reduction in chromosome number, effectively halving it from the original diploid state to haploid.
What is a duplicated chromosome?
A duplicated chromosome is a chromosome that has an exact copy of itself attached to it. This duplication occurs during the cell replication process and can lead to genetic abnormalities if not properly regulated. It can result in conditions like Down syndrome or cancers.
When are chromosome replicated?
Interphase is when DNA replication occurs. :)
How many rounds of chromosome replication occur in the cell?
One round of chromosome replication occurs in the cell during the S phase of the cell cycle. This results in each chromosome being duplicated, producing two identical DNA molecules called sister chromatids that are connected at the centromere.
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.
WHEN ARE CHROMOSOME (DNA) REPLICATED?
Interphase is when DNA replication occurs. :)
Where the cell does DNA replication take place?
DNA replication takes place in the chromosome which is located in the nucleus of a cell.
In which phase does chromosome replication occur?
Chromosome replication occurs during the S phase of the cell cycle. This is when DNA is synthesized to ensure that each daughter cell receives an identical copy of the genetic material during cell division.
What type of mutation occurs when part of a chromosome is missing after replication?
Deletion
Is down syndrome the result of a mutation on a gene?
No. It is due to a third chromosome (21) instead of just the normal two.
After replication each chromosome harbors what?
After replication, each chromosome harbors two sister chromatids, which are identical copies of the original chromosome. The sister chromatids are held together at the centromere and will later separate during cell division.
What is an original chromosome and its copy called?
An original chromosome is called a homologous chromosome, and its copy is called a sister chromatid. Homologous chromosomes have the same genes in the same order but may have different alleles, while sister chromatids are identical copies produced during DNA replication.
What are the two strands of a chromosome called?
The two identical strands of a chromosome are called chromatids. DNA replication occurs in the interphase stage of the cell cycle.
