Which would most likely decrease the genetic variation in the human population? a) humans having more chromosome pairs. b) crossing over occurring less often during meiosis. c) dna moving between maternal and paternal chromosomes. d) crossing over occurring more often during meiosis.

B. Crossing over occurring less often during meiosis

Answer;

B) Crossing over occurring less often during meiosis.

Explanation;Genetic variations are the variations or changes that occurs in the sequences of DNA in the genome of organisms. Or in other words the variations in the genetic make up of organisms in a population.Genetic variations is caused by factors such as mutations, gene flow, and sexual reproduction. Mutations in the DNA causes genetic variations by altering the genes of organisms in a population. Sexual reproduction promotes variable gene combinations in a population leading to genetic variation. This occurs in the process of meiosis as a result of cross over, and random segregation of alleles.