Question

4. When does gene exchange through chiasma formation occur between homologous
chromosomes?
BIOLOGY​

Answer 1

Explanation:

Crossing over takes place during pachytene stage of Prophase I of Meiosis I where the non sister chromatids of homologous chromosomes exchange genetic material, this results in recombination of the genetic material and creates new genetic combination. This results in variations, which can be beneficial to the offsprings providing a better survival advantage.

So, the correct answer is 'Crossing over produces new combinations of genes on alleles, increasing genetic variation. Genetic diversity increases the fitness of the population'

Answer 2

Qᴜᴇꜱᴛɪᴏɴ :

❥ When does gene exchange through chiasma formation occur between homologous chromosomes?

ᴀɴꜱᴡᴇʀ :

➩ Chiasmata are specialized chromatin structures that link homologous chromosomes together until anaphase. They form at sites where programmed DNA breaks generated by Spo11 undergo the full recombination pathway to generate crossovers.

Hope it helps uhh !! ♥