Testing the effectiveness of two natural selection simulations in the context of a large-enrollment undergraduate laboratory class

Table 4 Occurrence of key concepts in student responses to three short-answer questions in post-lab assignment

Key concept	# of items	Frequency
Key concept	# of items	Physical	Virtual
Variation in trait	2	0.69	0.64
Differential survival/reproduction	2	0.64	0.60
Heritability of trait	2	0.44	0.45
Mutation as source of variation	1	0.19	0.29
Randomness of mutation	1	0.11	0.09
Genetic drift	1	0.04	0.06

Some concepts appeared in responses to more than one item. There were no significant differences between treatments in the frequencies of any of the concepts (χ² tests, all p > 0.1)

ISSN: 1936-6434