Hatchlings of one lizard species have either genotype R or genotype S. Lizards of each genotype are raised on diet 1 or diet 2. Their mean adult body masses are compared.
Which result best supports the conclusion that both inherited alleles and diet affect adult body mass?
The two genotypes have different mean body masses on the same diet, and changing the diet alters the mean body mass of each genotype.
The two genotypes have different mean body masses on the same diet, but changing the diet does not alter either genotype's mean body mass.
The two genotypes have the same mean body mass on the same diet, and changing the diet does not alter either genotype's mean body mass.
The two genotypes have the same mean body mass on each diet, but changing the diet alters the mean body mass of each genotype.
96 exam-style questions on Edexcel GCSE Biology 3.4 Variation and the Human Genome Project, covering 3.4.1 Causes of variation, 3.4.2 Outcomes of the Human Genome Project, 3.4.3 Genetic variation within a population, and 3.4.4 Effects of genetic mutations on phenotype. Each one has a worked solution and a mark scheme showing where the marks go.