Scelta multipla
During meiosis, how does the number of chromosomes in a gamete (sex cell) compare to that in the original parent cell?
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9. Mitosis and Meiosis
Meiosis
Scelta multipla
During meiosis, how many chromatids are present in a tetrad?
A
1
B
2
C
8
D
4
Guida verificata passo dopo passo1
Recall that a tetrad forms during prophase I of meiosis when homologous chromosomes pair up.
Understand that each chromosome has already been replicated during the S phase, so each consists of two sister chromatids.
Since a tetrad consists of two homologous chromosomes paired together, and each chromosome has two sister chromatids, multiply the number of chromosomes by the number of chromatids per chromosome.
Calculate the total number of chromatids in a tetrad as \(2 \text{ chromosomes} \times 2 \text{ chromatids per chromosome} = 4 \text{ chromatids}\).
Therefore, the number of chromatids present in a tetrad during meiosis is 4.
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