Big picture and reproductive organs
Big picture and reproductive organs
Sexual reproduction produces offspring with a new combination of alleles when a male and female gamete fuse. Human gametes are haploid, written nnn, so fertilisation restores the diploid chromosome number, 2n2n2n.
Step-by-step lessons on Eduqas A Level Biology Sexual reproduction in humans. 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.