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Given a scientific passage and an answer, generate a question for the given answer.

Passage: A human sperm is a tiny cell with a tail. A human egg is much larger. Both cells are mature haploid gametes that are capable of fertilization. What process is shown in this photograph? Notice the sperm with the head piece containing the genetic material, a flagella tail that propels the sperm, and a midpiece of mostly mitochondria, supplying ATP. Answer: the "head"
Output:
What part of the sperm contains the genetic material?