Multiple Choice
Which of the following best explains how independent assortment occurs during meiosis and why it is important for genetic variation?
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3. Extensions to Mendelian Inheritance
Understanding Independent Assortment
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During which stage of meiosis does independent assortment of chromosomes primarily occur?
A
Anaphase II
B
Prophase I
C
Metaphase I
D
Telophase I
Verified step by step guidance1
Recall that independent assortment refers to the random orientation and separation of homologous chromosome pairs, which increases genetic variation in gametes.
Understand that independent assortment occurs when homologous chromosomes line up in pairs along the metaphase plate, allowing for different combinations of maternal and paternal chromosomes to be distributed to daughter cells.
Identify the stage in meiosis where homologous chromosomes are paired and aligned at the metaphase plate, which is Metaphase I.
Note that during Anaphase II, sister chromatids separate, but independent assortment of whole chromosomes has already occurred earlier.
Conclude that the primary stage for independent assortment is Metaphase I, when homologous chromosome pairs align independently of each other.
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