Mammoth Memory

Sex chromosomes


Females have two X chromosomes.

Females have two X chromosomes

Two female cheerleaders stood in an X position with pom-poms.


Males have an X and Y chromosome.

Males have an X and a Y chromosomes

Leonardo Da Vinci‚Äôs "Proportions of Man" or "Vitruvian Man" stood in an X pose wearing Y-fronts.

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