What is visible in the cell during prophase?
Spindle fibers (microtubules) are visible. In anaphase, the paired chromosomes (sister chromatids) separate and begin moving to opposite ends (poles) of the cell. Spindle fibers not connected to chromatids lengthen and elongate the cell. At the end of anaphase, each pole contains a complete compilation of chromosomes.
The centromeres will serve as anchors that’ll be used to pull the sister chromatids apart during a later phase of mitosis. And that’s what’s happening inside the nucleus during prophase!
Prometaphase is often referred to as “late prophase.” (Though it’s also sometimes called “early metaphase” or referred to as a distinct phase entirely!) Regardless, some really important things occur during prometaphase that propel cell division along and that help explain what happens in metaphase.
They disappear Why are chromosomes visible during prophase but not interphase? Chromosomes are now condensed, and the nucleus disappeared. Where are the chromosomes located during metaphase?
At the beginning of the first mitotic stage, prophase, the thread-like doubled chromosomes contract and become visible.
During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. The chromatin coils and becomes increasingly compact, resulting in the formation of visible chromosomes. The replicated chromosomes have an X shape and are called sister chromatids.
During prophase the nucleoli disappear and the chromatin fibers thicken and shorten to form discrete chromosomes visible with the light microscope. Each replicated chromosome appears as two identical chromatids joined at the centromere.
During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. The chromatin coils and becomes increasingly compact, resulting in the formation of visible chromosomes. Chromosomes are made of a single piece of DNA that is highly organized.
Prophase: Spindle fibers form at opposite poles of the cell. In animal cells, a mitotic spindle appears as asters that surround each centriole pair. The cell becomes elongated as spindle fibers stretch from each pole. Sister chromatids attach to spindle fibers at their kinetochores.
Prophase. Chromatin in the nucleus begins to condense and becomes visible in the light microscope as chromosomes.
During prophase, the nucleus disappears, spindle fibers form, and DNA condenses into chromosomes ( sister chromatids ). During metaphase, the sister chromatids align along the equator of the cell by attaching their centromeres to the spindle fibers.
In prophase, the nucleolus disappears and chromosomes condense and become visible. In prometaphase, kinetochores appear at the centromeres and mitotic spindle microtubules attach to kinetochores.