Question

Which of the following is not a characteristic feature during mitosis in somatic cells?
A. Spindle Fibres
B. Disappearance of nucleolus
C. Chromosome movement
D. Synapsis.

Answer 1

Hint:The major purpose of mitosis is for growth and to replace worn out cells. It occurs only in somatic cells. Somatic cells are any cell of the human body except the egg and sperm cells.

Complete answer:
To answer this question, first, we need to know about cell division. In single cellular organisms, mitosis is the only single structure of cell reproduction. One complete process of mitosis consists of two genetically alike cells. In bacteria, this mitosis causes a completely new, single organism. This is categories as asexual reproduction due to the fact that it does not need sexual intercourse for the formation of new organisms. In multicellular organisms, like us, mitosis only occurs in somatic cells, which comprise all cells in an organism excluding germ cells.

Now, let us find the solution from the option.
>Initial stage of nuclear separation, two round-structured proteins known as centrioles located themselves at inverse points of cell poles which are formed by that cell. Extended protein fibers known as microtubules elongate from the centrioles in all feasible ways, producing a structure known as a spindle.
>During prophase the chromosomes separate from one another, and so the nucleolus disappears.
>The nuclear membrane has to be taken out of the way before metaphase, so during metaphase leads to anaphase, the chromosomes can come out of the confines of the nucleus.
>Synapsis is the pairing of two homologous chromosomes that occurs during meiosis. It enables complementary homologous sets vital for their division, and chromosomal crossover between them. Synapsis occurs during prophase I of meiosis.

Thus, the correct answer is option D. Synapsis.

Note:Mitosis happens in somatic cells; this indicates that it can occur in all kinds of cells excluding the cells which are associated with formation of gametes. Important to every mitotic division, a replica of each chromosome is produced; so, after division, a complete pair of chromosomes is present in the nucleus of every newly formed cell.