DP Biology (first assessment 2025)

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Question 19N.2.SL.TZ0.3c

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Date November 2019 Marks available [Maximum mark: 3] Reference code 19N.2.SL.TZ0.3c
Level SL Paper 2 Time zone TZ0
Command term List Question number c Adapted from N/A
c.
[Maximum mark: 3]
19N.2.SL.TZ0.3c
(c)

List three characteristics of eukaryotic homologous chromosomes.

[3]

Markscheme

a. linear DNA molecules
OR
DNA associated with histone «proteins» ✔

b. carry the same sequence of genes ✔

c. «but» not necessarily the same alleles «of those genes» ✔

d. both are present when nucleus is in diploid state ✔
OR
occur in pairs ✔

e. have same size/length/banding patterns ✔

f. centromeres are in the same position ✔

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