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46 duplicated chromosomes. humans have 23 types of chromosomes (n), each with a homologous pair (1 from mom, 1 from dad) giving us 46 total (2n). When cells undergo replication they duplicate all their chromosomes. The duplicate remains attached to the original chromosome by a centromere. The two attached duplicates are called sister chromatids (this is what you see as an x shaped chromosome- 1 chromosome, 2 sisters) which will be pulled apart during anaphase, giving each cell, once they divide, a full set of 46 chromosomes.
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How many chromosomes does a somatic cell have?
46 chromosomes arranged into 23 pairs at replication.
How many chromosomes are in sex cells after DNA replication?
There are 23, so when sexual reproduction acurrs the fetus will have 46
If a cell has 46 chromosomes a the beginning of meiosis then at anaphase 2 there would be a total number of how many chromosomes?
At the beginning of meiosis, a cell with 46 chromosomes would undergo DNA replication to end up with 92 chromatids. During anaphase 2 of meiosis, these chromatids would separate, resulting in daughter cells with 46 chromosomes each, the same as the original cell before replication.
Human chromosomes have hundreds of where the dna is unzipped so replication can begin?
The human chromosomes have hundreds of origins of replication where the DNA unwinds and replication begins. These origins are specific DNA sequences that mark the starting points for the replication process by recruiting the necessary enzymes and proteins. Replication occurs bidirectionally from each origin, ensuring that the entire chromosome is faithfully duplicated.
What is the pairing of replication chromosomes during meiosis called?
The pairing of replication chromosomes during meiosis is called synapsis. This is when homologous chromosomes come together and align gene by gene to form a structure called a tetrad.
How many chromosomes does a somatic cell have?
46 chromosomes arranged into 23 pairs at replication.
Duplication of chromosomes occur in?
The replication of the chromosomes occurs during interphase.
How many chromosomes are in sex cells after DNA replication?
There are 23, so when sexual reproduction acurrs the fetus will have 46
What do we condense DNA into before replication occurs?
Before replication occurs, DNA is condensed into chromosomes.
Why does replication in prokaryotes differs from replication in eukaryotes?
Replication in prokaryotes differs from replication in eukaryotes for prokaryotic chromosomes have a single origin of replication, whereas eukaryotic chromosomes have many. Eukaryotes and prokaryotes for replication double stranded DNA, four kinds of dNTPS, primers, and origins.
Number of origins of replication on the chromosomes of eukaryotes?
High
If a cell has 46 chromosomes a the beginning of meiosis then at anaphase 2 there would be a total number of how many chromosomes?
At the beginning of meiosis, a cell with 46 chromosomes would undergo DNA replication to end up with 92 chromatids. During anaphase 2 of meiosis, these chromatids would separate, resulting in daughter cells with 46 chromosomes each, the same as the original cell before replication.
Is the process of duplicating chromosomes prior to cell division.?
DNA replication
Human chromosomes have hundreds of where the dna is unzipped so replication can begin?
The human chromosomes have hundreds of origins of replication where the DNA unwinds and replication begins. These origins are specific DNA sequences that mark the starting points for the replication process by recruiting the necessary enzymes and proteins. Replication occurs bidirectionally from each origin, ensuring that the entire chromosome is faithfully duplicated.
What is the pairing of replication chromosomes during meiosis called?
The pairing of replication chromosomes during meiosis is called synapsis. This is when homologous chromosomes come together and align gene by gene to form a structure called a tetrad.
What is the difference between replicated chromosomes and unreplicated chromosomes in DNA?
Replicated chromosomes have undergone DNA replication, producing two identical sister chromatids joined by a centromere. Unreplicated chromosomes have not undergone DNA replication and consist of a single chromatid. Replicated chromosomes are found during the S phase of the cell cycle, while unreplicated chromosomes are present in the G1 phase.
How do eukaryotes speed the process of replication-since they have multiple long chromosomes?
The eukaryotic genome is so much larger than the prokaryotic genome that it would not be practical to rely on a single origin of replication site when copying it for cell division. By incorporating several, the eukaryotic cell can divide without unnecessarily long delay in chromosomal replication.
