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Sex chromosomes

Sex chromosomes

Human body cells contain 232323 pairs of chromosomes. The first 222222 pairs are autosomes, which are similar in individuals of both sexes; the twenty-third pair is the pair of sex chromosomes.

5.1.10 Sex determination Lesson

  1. GCSE
  2. /Biology
  3. /5.1.10 Sex determination

Step-by-step lessons on OCR GCSE Biology 5.1.10 Sex determination. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

Lessons