What process is necessary for the inherited traits of an organism to be passed along by sexual reproduction and why?

Answer: Meiosis is the necessary process for the inherited traits of an organism to be passed along by sexual reproduction to bring about variation.

Explanation: Meiosis occurs in reproductive cells. It halves the chromosome number of parents to produce same (constant) number of chromosomes in the offsprings.

Meiosis leads to genetic variation among offsprings through recombination, crossing over, independent assortment and reduction and fusion of gametes.

Most abnormalities that are heritable are as a result of improper division during meiosis.