Question

If a diploid cell with 20 chromosomes and 32 C DNA enters a cell cycle then what will be the number of chromosomes and DNA after S-phase? O 20 chromosomes and 32 C DNA O 20 chromosomes and 64 C DNA 40 chromosomes and 32 C DNA O 40 chromosomes and 64 C DNA plz help me out​

Answer 1

After DNA S-phase amount if DNA is doubled but chromosomes number remains same as they separate at Anaphase stage. So correct answer will be 20 chromosomes and 64C DNA.
Hope this helps you

Answer 2

Given:

a diploid cell with 20 chromosomes and 32 C DNA enters a cell cycle.

To find:

Amount of chromosomes and DNA after S phase?

Calculation:

In S phase (a part of Interphase : SYNTHETIC PHASE), the cell duplicate majority of its cellular organelles, DNA, histone proteins, etc. which can be later divided among the daughter cells.

• So, DNA gets duplicated (i.e. doubled) in amount, but NUMBER OF CHROMOSOMES REMAINS SAME !

So, after S phase :

• 64 C DNA
• 20 chromosomes

will be seen in the cell.

$\star$ Hope It Helps.