Inbreeding
Backcrossing
Sexual reproduction
Gene dominance
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C. s*xual reproduction is a major cause of variation among organisms. This is because during s*xual reproduction, genetic information from two parent organisms is combined to form a unique genetic makeup in the offspring. This process leads to the shuffling and recombination of genetic material, resulting in genetic variation among individuals. In contrast, inbreeding and backcrossing involve the mating of related individuals, which reduces genetic variation and can lead to the expression of harmful recessive traits. Gene dominance refers to the phenomenon where one gene in a pair can mask the expression of the other gene. While gene dominance can impact the expression of traits, it is not a major cause of variation among organisms.
Attempting the question without a knowledge of gene dominance might be quite confusing because s*xual reproduction is known to be the reason for variation but s*xual reproduction cannot by itself cause variation but by gene flow
Myschool! The answer is s*xual reproduction not gene dominance. Offspring produced by s*xual reproduction are always different but for as*xual reproduction, the offspring bear complete resemblance to each other.
But now we're talking about why variation occurs between organisms
