How are babies made? That’s your answer. We can nitpick the prevalence of male and female secondary sexual characteristics, but in our species, biological sex reflects reproductive roles. Two chromosomes: X and Y. Two gametes: sperm and ovum.
How are babies made? That’s your answer. We can nitpick the prevalence of male and female secondary sexual characteristics, but in our species, biological sex reflects reproductive roles. Two chromosomes: X and Y. Two gametes: sperm and ovum.