Answer: In humans, there are 23 pairs of chromosomes, for a total of 46 chromosomes. During sexual reproduction, each parent contributes one chromosome from each pair. This means that there are 2^46, or 70,368,744,177,664 (seventy quadrillion, three hundred sixty-eight trillion, seven hundred forty-four billion, one hundred seventy-seven million, six hundred sixty-four) possible combinations of chromosomes from sexual reproduction in humans.
Step-by-step explanation: