Question

complete the sentence.
in the g₂ phase, also known as the gap 2 or growth 2 phase, the dna copy is checked for accuracy, and the centrosome divides into two. the cell continues to grow, make new proteins and organelles, and make final preparations for cell division.
at the end of the s phase, cells have twice as much
and twice as many
as cells at the end of the
phase.

Explanation:

The S phase of the cell cycle is when DNA replication occurs. So at the end of the S phase, cells have twice as much DNA (since DNA is replicated) and twice as many chromatids (each chromosome has two sister chromatids after replication) as cells at the end of the G₁ phase (before DNA replication). The G₁ phase is the growth phase before DNA synthesis.

Answer:

At the end of the S phase, cells have twice as much $\boldsymbol{\text{DNA}}$ and twice as many $\boldsymbol{\text{chromatids}}$ as cells at the end of the $\boldsymbol{\text{G}_1}$ phase.