Textbook Question
After S phase, what makes up a single chromosome?
a. two daughter chromosomes
b. a double-stranded DNA molecule
c. two single-stranded DNA molecules
d. two sister chromatids
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3. Energy & Cell Processes
Interphase
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Chromatids are __________.
A
found only in aberrant chromosomes
B
held together by the centrioles
C
the bacterial equivalent of eukaryotic chromosomes
D
composed of RNA
E
identical copies of each other if they are part of the same duplicated chromosome
Verified step by step guidance1
Understand that chromatids are structures that appear during cell division, specifically during the phases of mitosis and meiosis.
Recognize that each chromosome is duplicated before cell division, resulting in two identical copies called sister chromatids.
Note that sister chromatids are held together by a structure called the centromere, not centrioles.
Clarify that chromatids are composed of DNA and associated proteins, not RNA.
Conclude that chromatids are identical copies of each other when they are part of the same duplicated chromosome, which is the correct understanding of their role in cell division.
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