What happens during Prophase I and Metaphase I of meiosis?
Understand the Problem
The question appears to involve concepts related to the stages of meiosis, specifically Prophase I and Metaphase I. This suggests a need for comprehension of the process of meiosis, including the formation of homologous chromosomes, synapsis, and the alignment of chromosomes during metaphase.
Answer
Prophase I: Chromosome pairing and crossing-over. Metaphase I: Chromosomes align at the equator.
During Prophase I, homologous chromosomes pair up to form tetrads and undergo crossing-over, exchanging genetic material. In Metaphase I, the paired homologous chromosomes align at the equator of the cell, with spindle fibers attaching to them.
Answer for screen readers
During Prophase I, homologous chromosomes pair up to form tetrads and undergo crossing-over, exchanging genetic material. In Metaphase I, the paired homologous chromosomes align at the equator of the cell, with spindle fibers attaching to them.
More Information
Crossing-over during prophase I leads to genetic diversity by exchanging genetic material between homologous chromosomes.
Tips
Common mistakes include confusing the alignment of homologous chromosomes in metaphase I with the alignment of individual chromatids in metaphase II.
Sources
- Phases of meiosis I - Khan Academy - khanacademy.org
- Genetics, Meiosis - StatPearls - NCBI Bookshelf - ncbi.nlm.nih.gov
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