Human karyotype

Each species has a specific number of chromosomes with sizes and shapes that can be arranged in a karyotype.

Human somatic cells (cells other than sex cells) have 46 chromosomes.

44 of the 46 are occur in homologous pairs.

The other 2 chromosomes are sex chromosomes: females have 2 X chromosomes; males have 1 X and 1 Y chromosome.

Thus somatic cells are diploid: chromosomes occur in pairs. One in each pair is inherited from the mother, the other from the father.

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