Before meiosis can begin, what key event must occur to ensure each gamete can receive a complete set of genetic information?

• A. Cytokinesis to split the cytoplasm and form haploid daughter cells before nuclear division
• B. Separation of sister chromatids during anaphase II to reduce the chromosome number
• C. Crossing over between sister chromatids to create new allele combinations
• D. DNA replication during S phase to produce sister chromatids for each chromosome

Answer: (D)