What happens if a crab loses its leg?

Another reason crabs lose a limb is when a crab moults and does not shed their entire exoskeleton in one piece, but instead section by section, over a number of days. Generally if they survive the mount they grow their limbs back again (regeneration) and can be happy and healthy

Explanation:

mendel's first law states that during the formation of reproductive cells , pairs of hereditary factors for a specific trait separate so that offspring receive one factor from each parent.

explanation:

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.