GCSE Biology (AQA)

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Haploid & Diploid cells

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Cell Biology Cell Division

Haploid & Diploid cells

3:06 Chromosomes and Genes
Spec 4.1.2.1 4.6.1.6
Previous Chromosomes Next Genes & Alleles
  • Diploid cells contain two copies of each chromosome.
  • Diagrams illustrate differences between animal and plant cells, both of which are typically diploid.
  • Human body cells are diploid with 23 pairs of chromosomes, totaling 46 chromosomes.
  • Chromosomes are inherited equally from both biological parents (23 from each).
  • Chromosomes in diagrams are organized by size, from smallest to largest.
  • Some humans may have chromosome disorders, resulting in different chromosome counts.
  • Haploid cells, like sperm and egg cells (gametes), contain only one copy of each chromosome, totaling 23.
  • Gametes carry half of an organism's DNA, crucial for reproduction to form a new diploid organism with 46 chromosomes.
  • Summary: Haploid cells (e.g., sperm, ovum) have 23 chromosomes; diploid cells (e.g., body cells) have 46 chromosomes or 23 pairs.
  • Most body cells are diploid with paired chromosomes, while sex cells are haploid with unpaired chromosomes.

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