In a study of a secluded population of the pocket mouse (Chaetodipus intermedius) inhabiting a volcanic lava flow, researchers found that 19% of the mice exhibited the melanic (dark-furred) phenotype. Melanism in these mice is controlled by a single gene, where the allele for dark fur (MMM) is completely dominant over the allele for light fur (mmm).
Assuming this population is in Hardy–Weinberg equilibrium, calculate the percentage of pocket mice in this population that are heterozygous (MmMmMm) for this gene.
23 exam-style questions on AQA A Level Biology Populations (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.