Scelta multipla
In humans, which cell type is NOT formed by meiosis?
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9. Mitosis and Meiosis
Meiosis
Scelta multipla
In a typical meiotic division that produces gametes, how many times does prophase (PMAT) occur across meiosis I and meiosis II?
A
Twice (once in meiosis I and once in meiosis II)
B
Once (only in meiosis I)
C
Three times (once before meiosis I and twice in meiosis II)
D
Four times (once for each of P, M, A, and T)
Guida verificata passo dopo passo1
Recall that meiosis consists of two consecutive divisions: meiosis I and meiosis II, each with its own set of phases: prophase, metaphase, anaphase, and telophase (PMAT).
Understand that prophase is the first phase of each division where chromosomes condense and homologous chromosomes pair up in meiosis I, and sister chromatids prepare to separate in meiosis II.
Identify that prophase occurs once in meiosis I (prophase I) and once in meiosis II (prophase II), making a total of two prophase stages during meiosis.
Note that metaphase, anaphase, and telophase also occur once in each division, but these are separate phases and do not affect the count of prophase occurrences.
Conclude that since prophase happens once before meiosis I and once before meiosis II, the total number of prophase stages in meiosis is two.
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