| Date | May 2015 | Marks available | 1 | Reference code | 15M.1.HL.TZ2.25 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Identify | Question number | 25 | Adapted from | N/A |
Question
Which is a statement of Mendel’s law of independent assortment?
A. Allele pairs separate during gamete formation and recombine during fertilization.
B. Allele pairs for different genes separate independently during gamete formation.
C. Unlinked alleles are assorted with a 9 : 3 : 3 : 1 ratio in a dihybrid cross.
D. Allele pairs for the same gene are assorted independently during gamete formation.
Markscheme
B
Examiners report
Many candidates were tricked to answer that alleles from the same gene are assorted independently. While the alleles migrate to each pole, it is the collection of different genes that are assorted independently.
