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Which three phases are individual chromosomes no longer visible?
During interphase, chromosomes are not visible as distinct structures. Instead, the DNA is in the form of chromatin, a less condensed state where individual chromosomes cannot be seen.
During what cell can chromosomes be seen clearly?
In the early stages of mitosis or meiosis (cell division), the chromatin strands become more and more condensed. They cease to function as accessible genetic material (transcription stops) and become a compact transportable form. This compact form makes the individual chromosomes visible, and they form the classic four arm structure, a pair of sister chromatids attached to each other at the centromere. The shorter arms are called p arms (from the French petit, small) and the longer arms are called q arms (q follows p in the Latin alphabet). This is the only natural context in which individual chromosomes are visible with an optical microscope.
Compare and contrast the appearance of the chromosomes in onion and whitefish?
Chromosomes in onion cells are typically longer and have visible constrictions called centromeres, giving a beaded appearance. On the other hand, whitefish chromosomes are usually shorter and more rod-shaped without distinct centromeres. Additionally, onion chromosomes are usually larger in size compared to whitefish chromosomes.
What happens during prometaphase?
=In this stage the nuclear envelope breaks down so there is no longer a recognizable nucleus. Some mitotic spindle fibers elongate from the centrosomes and attach to kinetochores, protein bundles at the centromere region on the chromosomes where sister chromatids are joined. Other spindle fibers elongate but instead of attaching to chromosomes, overlap each other at the cell center.=
Name 2 things that occur during telophase 1?
The nuclear membrane and nucleolus (these had disappeared during prophase). They had originally disappeared during prophase because the chromatin condensed into chromatids and then coiled into chromosomes and needed to seperate. They reappear during telophase because the chromatid uncoils again to form chromatin. This means that the cell no longer needs to seperate so it can reform the membrane and nucleolus.
Which three phases are individual chromosomes no longer visible?
During interphase, chromosomes are not visible as distinct structures. Instead, the DNA is in the form of chromatin, a less condensed state where individual chromosomes cannot be seen.
During what cell can chromosomes be seen clearly?
In the early stages of mitosis or meiosis (cell division), the chromatin strands become more and more condensed. They cease to function as accessible genetic material (transcription stops) and become a compact transportable form. This compact form makes the individual chromosomes visible, and they form the classic four arm structure, a pair of sister chromatids attached to each other at the centromere. The shorter arms are called p arms (from the French petit, small) and the longer arms are called q arms (q follows p in the Latin alphabet). This is the only natural context in which individual chromosomes are visible with an optical microscope.
Is E. coli chromosomes longer than the diameter of an individual E. coli bacterium?
Yes
What is each chromatid called after ther centromeres divide and the sister chromatids separate during mitosis?
After the centromeres divide and the sister chromatids separate during mitosis, each chromatid is referred to as a daughter chromosome. At this stage, the daughter chromosomes are distinct and no longer considered sister chromatids, as they are now individual chromosomes that will move to opposite poles of the cell during anaphase.
What ray is longer ultraviolet or visible rays?
All visible wavelengths are longer than the wavelength of ultraviolet.
What is longer than visible wavelength called?
Infrared has a longer wavelength, and a lower frequency, than visible light.
Is visible light longer or shorter then rays?
Visible light is made of rays. There are rays with wavelengths that are shorter than visible light and other with longer wavelength.
If you do not have stretch marks during pregnancy will you have them after you give birth?
yes, but they will be more visible, wose and stay longer (up to 20 yrs)
What do a cat's testicles look like after neutering?
After neutering, a cat's testicles are typically removed during the surgery, so they will no longer be visible.
Light energy with wavelengths longer than visible red?
Light energy with wavelengths longer than visible red is infrared light.
What is the structure that divides the chromosomes into longer and shorter segments?
the centromere
Visible in a sentence?
It's visible that the dog wants more food. With all the fog surrounding, the road was no longer visible. It was very visible that she was disappointed.
