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Question
The diagram given below represents a certain phenomenon which occurs during meiosis. Name and explain the phenomenon by using the terms homologous chromosomes, chromatids, crossing over.
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Solution
Chiasmata are formed when certain chromatids of homologous chromosomes break and reintegrate at the site of intersection during pairing. This leads to the exchange of chromatid material between chromosomes from the parents, resulting in the formation of a new gene combination through crossing-over.
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