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From Mendel to genes

From Mendel to genes

Gregor Mendel crossed pea plants with contrasting features and counted their offspring. Ratios such as 3:13:13:1 led him to propose that separate units of inheritance pass from parents to offspring.

3.3 Inheritance Lesson

  1. GCSE
  2. /Biology
  3. /3.3 Inheritance

Step-by-step lessons on Edexcel GCSE Biology 3.3 Inheritance, covering 3.3.1 Gregor Mendel and the basis of genetics, 3.3.2 Alleles and inherited characteristics, 3.3.3 Monohybrid inheritance, 3.3.4 Determination of sex at fertilisation, 3.3.5 Outcomes from monohybrid crosses, 3.3.6 Inheritance of ABO blood groups, 3.3.7 Inheritance of sex-linked disorders, and 3.3.8 Multiple genes and phenotypic features. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

Lessons