Question

Which statement about sister chromatids is false? They separate from each other during meiosis I. They are joined during prophase I and metaphase I at their common centromere. They separate from each other during each mitotic anaphase. They arise by replication during S phase. They usually contain identical versions of the same genetic information.

Answer 1

STATEMENT 1.

The false statement about sister chromatids is that they separate from each other during meiosis I; the separation occurs during anaphase II of meiosis II after they are joined at their centromere during prophase I and metaphase I.

Step-by-step explanation:

Among the statements about sister chromatids, the false one is that they separate from each other during meiosis I. In fact, sister chromatids are joined together at their common centromere during both prophase I and metaphase I of meiosis. They do not separate until meiosis II. Specifically, during anaphase II of meiosis II, the sister chromatids are pulled apart to opposite poles of the cell to ensure that each gamete receives only one copy of each chromosome. Sister chromatids arise by replication during the DNA duplication of the S phase, resulting in two copies that are usually identical in their genetic information.

It is crucial to distinguish between the events of meiosis I and II. In meiosis I, homologous chromosomes separate, but sister chromatids remain together. This leads to the production of two cells, each with a haploid set of duplicated chromosomes. Then, in meiosis II, the sister chromatids finally separate, concluding the process with four genetically distinct gametes, each containing a haploid set of chromosomes.

Answer 2

The correct answer will be They separate from each other during meiosis I.

Step-by-step explanation:

A sister chromatid is the exact copy of the DNA which is synthesized during the S phase by the process of DNA replication. Since the chromatid is formed through the process of DNA replication therefore it contains the identical genetic information of the parent DNA.

The sister chromatids join to another similar chromatid through a common centromere during the prophase I of the meiosis I which gets separated from each other during anaphase II of meiosis II.

Since, the homologous chromosomes gest separated during the anaphase I of meiosis I and not sister chromatids which get separated during anaphase II therefore, the selected option is the correct answer.