Question

Question related to the structure of chromosome, cell- cycle & cell division :-

(i) Name the shortest phase of mitosis ?

(ii) What is Chiasmater ?

(iii) What is Bivalent ?​

Answer 1

Explanation:

Cell division does not take a long time. Prophase is the longest phase of mitosis, but it occurs faster than interphase. Anaphase is the shortest phase of mitosis. In anaphase, the sister chromatids are pulled apart to opposite ends of the cell

is the point of contact, the physical link, between two (non-sister) chromatids belonging to homologous chromosomes. At a given chiasma, an exchange of genetic material can occur between both chromatids, what is called a chromosomal crossover, but this is much more frequent during meiosis than mitosis.

DescriptionA bivalent is one pair of chromosomes in a tetrad. A tetrad is the association of a pair of homologous chromosomes physically held together by at least one DNA crossover. This physical attachment allows for alignment and segregation of the homologous chromosomes in the first meiotic division.

Answer 2

Anaphase is the shortest phase of mitosis

chiasmata is the point where crossing over of genetic material takes place between two non sister chromatids of homologous chromosomes

bivalent are two homologous chromosomes connected in pairs

I hope this helps ( ╹▽╹ )