Two rabbits, P and Q, were produced by adult cell cloning from the same animal. Genetic testing showed that P and Q had the same alleles. At birth, neither rabbit had a scar. At 12 months, rabbit P had a scar on one ear and rabbit Q did not.
What is the most likely conclusion from these observations?
An environmental condition after birth affected the phenotype of rabbit P.
The difference in phenotype means that P and Q now have different genomes.
Rabbit P inherited an allele for the scar from its surrogate mother.
The environmental conditions changed the alleles carried by rabbit P.
80 exam-style questions on AQA GCSE Biology 6.2 Variation and evolution, covering 6.2.1 Variation, 6.2.2 Evolution, 6.2.3 Selective breeding, 6.2.4 Genetic engineering, and 6.2.5 Cloning. Each one has a worked solution and a mark scheme showing where the marks go.