-20-40 = ___
-56
60
-60
10
-20-40 = - (20 + 40) [-x-y = -(x+y)]
= -(60)
What will be the number of DNA AND CHROMOSOME respectively after S phase if number of chromosome in root tip cells are 20 -
1)20&20
2)20 & 40
3)40&40
4)40&20