Asexual reproducers don't have to spend time producing gametes, finding mates, satisfying their selection criteria, and then mating.
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In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females.
You can tell be the color of it