Which of the following events occurs during prophase stage of mitosis?

During prophase, the chromosomes condense and centrosomes move to opposite sides of the nucleus, initiating formation of the mitotic spindle.

Which of the following events is occur in prophase I?

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

Which of these occurs during prophase?

The mitotic spindle also begins to develop during prophase. As the cell’s two centrosomes move toward opposite poles, microtubules gradually assemble between them, forming the network that will later pull the duplicated chromosomes apart.

What happens during prophase?

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 sister chromatids are pairs of identical copies of DNA joined at a point called the centromere.

Which of the following events occur during prophase 2?

During prophase II of meiosis II, four important steps occur. These are the condensing of chromatin into chromosomes, disintegration of the nuclear envelope, migration of centrosomes to either pole, and the reconstruction of the spindle apparatus. However, centrosomes are not present in all cells.

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Which of the following occurs in prophase I but does not occur in prophase II?

Which of the following is a characteristic seen in prophase I that does NOT occur in prophase II? Crossing over occurs. Anaphase II is essentially the same as mitotic anaphase except that in anaphase II ________ and in mitotic anaphase ________. One difference between mitosis and meiosis is ________.

What other changes occur during prophase?

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.

What happens in prophase 1 of mitosis?

During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis. The paired chromosomes are called bivalents, and the formation of chiasmata caused by genetic recombination becomes apparent. Chromosomal condensation allows these to be viewed in the microscope.

Does crossing over occur in prophase 2?

Crossing over does not occur during prophase II; it only occurs during prophase I. In prophase II, there are still two copies of each gene, but they are on sister chromatids within a single chromosome (rather than homologous chromosomes as in prophase I).

Which event occurs in prophase 1 of meiosis but not prophase of mitosis?

Explanation: Crossing over is the only answer choice that does not occur during mitosis. Crossing over occurs during prophase I of meiosis and involves swapping of genetic information between homologous chromosomes. This require the formation of tetrads, which does not occur during mitosis.