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Inheritance (A-level only)
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Genes, alleles and phenotype

Genes, alleles and phenotype

Homologous chromosomes with allele A and allele a at the same locus, showing genotype Aa and phenotype also influenced by environment

Inheritance explains how alleles are passed from parents to offspring. In a diploid organism, homologous chromosomes carry the same genes at the same loci, but they can carry different alleles.

Inheritance (A-level only) Lesson

  1. A Level
  2. /Biology
  3. /Inheritance (A-level only)

Step-by-step lessons on AQA A Level Biology Inheritance (A-level only). Each one builds up to exam-style questions. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.

Lessons