Are chromosomes visible during prophase of mitosis?

What is visible during the prophase of mitosis?

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.

During which phases of mitosis are the chromosomes visible?

In prophase, each chromosome becomes condensed and more visible, and there is the breakdown of the nuclear membrane and appearance of spindle fibers. In the next phase, metaphase, the chromosomes line up along the metaphasic plate.

Are chromosomes visible during mitosis?

Chromosomes, composed of protein and DNA, are distinct dense bodies found in the nucleus of cells. … However during cell division, mitosis, the chromosomes become highly condensed and are then visible as dark distinct bodies within the nuclei of cells.

What makes chromosomes visible during prophase?

When prophase begins, the DNA molecules are progressively shortened and condensed by coiling, to form visible chromosomes. … The spindle fibers shorten and the centromere splits separating the two sister chromatids, the individual chromosomes are pulled to opposite poles of the cell.

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Why are chromosomes visible during prophase but not interphase?

Why are chromosomes visible during prophase but not interphase? Chromosomes are now condensed, and the nucleus disappeared.

What distinguishes prophase I of meiosis from prophase of mitosis?

In mitosis, prophase, metaphase, anaphase and telophase occur once. Chromosomes condense and the centrosomes begin to form an early spindle. Meiotic prophase I is much longer that mitotic prophase. During prophase I homologous chromosomes make contacts with each other called chiasmata and “crossing over” occurs.

Which of the following events occur during prophase of mitosis?

The correct answer is (c) synapsis and crossing over. During prophase I of meiosis, synapsis and crossing over take place.

Why is chromosomes are only visible in mitosis?

Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope.

Why are chromosomes visible during mitosis?

Chromosomes become visible during mitosis because they condense themselves to thick, visible strands. Regularly, they are more spread out as thin strands and therefore invisible to the eye even with a microscope.