A) DNA duplication
B) No increase in chromosome number
C) DNA replication
D) Duplication of centriole in the nucleus of eukaryotic animal cell.
Correct Answer: D
Solution :
S or synthesis phase marks the period during which the DNA synthesis or replication takes place. During this time the amount of DNA per cell doubles. If the initial amount of DNA is denoted as 2C then it increases to 4C.
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