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प्रश्न
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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उत्तर
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.
संबंधित प्रश्न
Find examples where the four daughter cells from meiosis are equal in size and where they are found unequal in size.
Distinguish anaphase of mitosis from anaphase I of meiosis
List the main differences between mitosis and meiosis.
Can there be mitosis without DNA replication in S phase?
Mention whether the following statement is (T) Or (F). Give reason in support of your answer.
Crossing over between chromatids can occur only between homologous chromosomes.
Choose the correct answer:
Crossing over is a feature of ______________
Four daughter cells formed after meiosis are
Meiosis is evolutionary significant because it results in :
Genetic recombination is due to ______.
Give reason:
The children of the same parents, howsoever similar, are different from each other in certain aspects.
