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What is the portion of the cell cycle during which the chromosomes are invisible under the light microscope because they are not yet condensed?
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Why do the chromosomes become easier to see under the microscope just before mitosis?
during mitosis and meiosis because the condensed chromosomes are thicker and therefore more prominent.
Why cant you see the chromosomes during interphase?
In interphase, the DNA has just replicated and exists as loosely coiled chromatins. They have not yet condensed enough to be the form of a chromosome. In the next stage, prophase, the DNA will shorten and condense into the easily recognizable chromosome structure.
Why do karyotypes always show chromosomes at the point when cell division is about to occur?
They show chromosomes at the point when cell division is about to occur because the chromosomes are condensed and aligned which makes it easy to tell if there are the correct number and configurations of the chromosomes.
Why do you need to count chromosomes during mitosis?
It is possible to count chromosomes only during vell division (mitosis or meiosis). This is because when the cell is not dividing the chromosomes are in an uncoiled, extended state and are not visible under the microscope. During cell division the chromosomes coil up, becoming shorter and thicker and so visible. At this time they can be counted.
Why are chromosomes sometimes drawn as a striaght line and other times in an x configuration?
Because those are the shapes of the individual chromosomes observed under an optical microscope.
Why do the chromosomes become easier to see under the microscope just before mitosis?
during mitosis and meiosis because the condensed chromosomes are thicker and therefore more prominent.
What is it called when DNA is scrunched up in dividing cells?
Chromatin, if "scrunched up" refers to uncoiled. It is chromosomes not chromatin
Why cant you see the chromosomes during interphase?
In interphase, the DNA has just replicated and exists as loosely coiled chromatins. They have not yet condensed enough to be the form of a chromosome. In the next stage, prophase, the DNA will shorten and condense into the easily recognizable chromosome structure.
Why do karyotypes always show chromosomes at the point when cell division is about to occur?
They show chromosomes at the point when cell division is about to occur because the chromosomes are condensed and aligned which makes it easy to tell if there are the correct number and configurations of the chromosomes.
It is not easy to observe individual chromosomes during interphase because?
the DNA has not been duplicated yet. they have uncoiled to form long, thin strands. they leave the nucleus and are scattered throughout the cell. homologous chromosomes do not pair up until division starts.
Why is the microscope important in the study of zoology?
Because with the use of a microscope we are able to view living and non-living organisms that are invisible to the naked eye.
When can you see chromosomes under light microscope?
only at the time of cell division in the metaphase and in the anaphase the chromosome are visible. because at this time the chromatin get aggregate and form the thick chromosome which are visible under microscope.
Is it impossible to count individual chromosomes during interphase?
Chromosomes cannot be counted during interphase because they are uncoiled and extended and so not visible under the microscope. When the cell divides the chromosomes become shorter and thicker, so they are visible under the microscope and can be counted.
Why are the chromosomes not condensed during all stages of mitosis?
When replicating or during transcription, DNA needs to uncoil in order to give the proper code. When the chromosomes are condensed, it cannot uncoil itself to give any sort of message. In order for the cell to remain functional, it must be able to code DNA.
Why do you need to count chromosomes during mitosis?
It is possible to count chromosomes only during vell division (mitosis or meiosis). This is because when the cell is not dividing the chromosomes are in an uncoiled, extended state and are not visible under the microscope. During cell division the chromosomes coil up, becoming shorter and thicker and so visible. At this time they can be counted.
Sara would like to film the movement of chromosomes during cell division Her best choice for a microscope would be a?
light microscope, because the specimen is alive
Why are chromosomes sometimes drawn as a striaght line and other times in an x configuration?
Because those are the shapes of the individual chromosomes observed under an optical microscope.
