Question

which of the following describes the dna in sister chromatids?
o they are produced by semiconservative dna replication and they are attached to each other from the start of g2 phase until the start of anaphase.
o they contain significantly different dna sequences
o they are produced by semiconservative dna replication
o they are attached to each other from the start of g2 phase until the start of anaphase.
o they contain significantly different dna sequences, they are produced by semiconservative dna replication and they are attached to each other from the start of g2 phase until the start of anaphase.

Explanation:

Sister chromatids are produced by semiconservative DNA replication during the S - phase. They remain attached at the centromere from the end of S - phase (which is part of the G2 - phase contextually) until anaphase of mitosis or meiosis II when the centromere splits. They have identical DNA sequences as they are exact copies of each other.

Answer:

They are produced by semiconservative DNA replication and they are attached to each other from the start of G2 phase until the start of anaphase.