Scelta multipla
If a daughter cell has 50 chromosomes after mitosis, how many chromosomes did the original parent cell have before mitosis?
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9. Mitosis and Meiosis
Mitosis
Scelta multipla
In the context of mitosis, what is the correct term for a replicated chromosome and its two identical chromatids joined together?
A
A centromere
B
A pair of sister chromatids
C
A homologous chromosome pair
D
A tetrad
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Understand the structure of chromosomes during mitosis: after DNA replication, each chromosome consists of two identical copies called chromatids.
Recognize that these two identical chromatids are joined together at a specific region called the centromere.
Recall the terminology: a single chromatid is one copy of the chromosome, while two identical chromatids joined together are called sister chromatids.
Note that a pair of sister chromatids together is often referred to as a replicated chromosome.
Distinguish this from other terms: a homologous chromosome pair refers to one chromosome from each parent, and a tetrad refers to four chromatids paired during meiosis, not mitosis.
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