Which of the following is NOT true about meiosis? homologous chromosomes synapse with one anothersister centromeres detach from each other in anaphase Ilsister chromatids attach to spindle fibers from opposite poles in metaphase I its final products are haploid crossing over occurs between non-sister chromatids in prophase l
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The following statements are correct, except a. During the mitosis, the two sister chromatids (joint by a centromere) are identical. b. During meiotic prophase II, the two sister chromatids (joint by a centromere) are identical, i.e., containing identical DNA sequences. c. During meiotic prophase I, non-sister chromatids from two homologous chromosomes are joint by the synptonemal complex. d. In meiosis I, a pair of homologous chromosomes lines up in random orientation on the equator during metaphase e. In meiosis, DNA replication occurs once, followed by two rounds of cell division
Sri K.
As a result of crossing over, sister chromatids are no longer identical to each other. True Crossing over prevents homologous chromosomes from separating during meiosis I. False For crossing over to occur, homologous chromosomes must align precisely early in prophase I so that nonsister chromatids can exchange corresponding segments of DNA. Crossing over occurs at the ends of chromosomes, rather than near the centromeres.
Bryan V.
Which of the following events is characteristic of synapsis during Prophase I? Spindle microtubules attach to each chromatid of a duplicated chromosome. Homologous pairs form 'chiasmata' and experience "crossing-over". Non-identical sister chromatids are attached at the start of Meiosis II Homologous pairs are attached to the "metaphase plate" Homologous pairs segregate into separate, newly formed nuclei.
Adi S.
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