Question

Write the difference between crossing over and chiasma formation.

Answer 1

Answer:

Crossing over may be a development that takes place between nonsister chromatids of homologous chromosomes and also the phenomenon takes place at molecular level. chiasm may be a manifestation of that biological process.

Explanation:

• During 1st cellular division division of a cell, homologous chromosomes would combine up and at phase stage of prophase one biological process takes place.

• Crossing over isn't seen beneath magnifier. Chiasmata are seen beneath magnifier in phase and stage stages of prophase one.

• As the division progresses, the homologous chromosomes begin to drag apart. At the purpose of exchange the homologues stay hooked up, as if by a knot. now is named chiasmata.

• Chiasmata step by step shift towards telomeres and principally disappear in stage.

Answer 2

In pachytene stage of meiosis 1 the two non sister chromatids undergoes crossing over. It is exchange of genetic material between them.

Chiasmata is a X shaped structure formed in diplotene stage of meiosis 1 . It is the site in which the 2 homologous chromosome are still attached even after their separation