CELL STRUCTURES AND FUNCTION
CELL DIVISION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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separation of two sister chromatids
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A molecular interaction between two sister chromatids
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An exchange of information between two homologous chromosomes
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A molecular interaction between two non-sister chromatids
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Detailed explanation-1: -The correct answer to the above question is: B. Chromatids of homologous chromosomes exchange corresponding segments.
Detailed explanation-2: -Crossing Over Crossing over, as related to genetics and genomics, refers to the exchange of DNA between paired homologous chromosomes (one from each parent) that occurs during the development of egg and sperm cells (meiosis).
Detailed explanation-3: -Crossing over was described, in theory, by Thomas Hunt Morgan. He relied on the discovery of Frans Alfons Janssens who described the phenomenon in 1909 and had called it “chiasmatypie". The term chiasma is linked, if not identical, to chromosomal crossover.
Detailed explanation-4: -Crossing over is the exchange of genetic material between non-sister chromatids of homologous chromosomes during meiosis, which results in new allelic combinations in the daughter cells.
Detailed explanation-5: -Explanation: Crossing over is a process that happens between homologous chromosomes in order to increase genetic diversity. During crossing over, part of one chromosome is exchanged with another. The result is a hybrid chromosome with a unique pattern of genetic material.