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IB Biology HL D2.1.5 Dna Replication Prerequisite Questions

DNA replication occurs during interphase and produces chromosomes with sister chromatids. The sister chromatids remain joined at their centromeres until they separate.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify S phase of interphase as the stage when DNA replication occurs.
  • Calculate chromatid number after DNA replication from the diploid chromosome number.

IB Biology HL D2.1.5 Dna Replication Prerequisite Questions question 1

[Maximum number: 1]

The image shows a cell from the root tip of an onion (Allium cepa) ( 2 n=16 ) during late prophase of mitosis.

Figure for Question IB Biology HL D2.1.5 Dna Replication Prerequisite Questions question 1 — IB Biology HL

How many chromatids are present in the cell?

A

8

B

16

C

32

D

64

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