In what stage of meiosis would chiasma most likely be observed?

Ans.

Chaisma is defined as a contact point or physical link between two the two non-sister chromatids that belong to homologous chromosomes.  It is responsible for the exchange between genetic material, which is known as crossing over and is important for genetic variations.

Crossing over and chaisma formation occurs in meiosis cell division generally as it is responsible for chromosomal segregation in gametes. Formation of chaisma takes place during prophase I diplotene stage.

Thus, the correct answer is 'diplotene stage.'

Prophase I

the answer is b.) hydrogen bonds between bases.