Scelta multipla
What is the primary function of meiosis in sexually reproducing organisms?
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9. Mitosis and Meiosis
Meiosis
Scelta multipla
Synapsis (pairing of homologous chromosomes via the synaptonemal complex) occurs during which stage of meiosis?
A
Prophase I (specifically zygotene)
B
Metaphase I
C
Anaphase I
D
Prophase II
Guida verificata passo dopo passo1
Recall the stages of meiosis I and meiosis II, focusing on the key events that characterize each stage.
Understand that synapsis refers to the pairing of homologous chromosomes, which is a critical step for genetic recombination.
Identify that synapsis occurs during prophase I of meiosis, where homologous chromosomes come together and form the synaptonemal complex.
Recognize that prophase I is subdivided into several substages: leptotene, zygotene, pachytene, diplotene, and diakinesis, with synapsis specifically occurring during the zygotene stage.
Conclude that the correct stage for synapsis is prophase I, specifically the zygotene substage, distinguishing it from metaphase I, anaphase I, and prophase II where synapsis does not occur.
