DP Biology (last assessment 2024)
Question 17N.2.HL.TZ0.05a
| Date | November 2017 | Marks available | [Maximum mark: 2] | Reference code | 17N.2.HL.TZ0.05a |
| Level | HL | Paper | 2 | Time zone | TZ0 |
| Command term | Describe | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 2]
17N.2.HL.TZ0.05a
(a)
Describe the process of crossing over.
[2]
Markscheme
a. occurs during prophase I/during meiosis
b. homologous chromosomes form bivalents/pair up
c. breakage and rejoining of chromatids
d. exchange «of DNA/alleles» between non-sister chromatids/homologous chromosomes
[Max 2 Marks]
