Most triploid zygotes arise from
A. fertilization of a diploid egg by a normal haploid sperm.
B. fertilization of a normal haploid egg by a diploid sperm.
C. fertilization of a normal haploid egg by two sperm.
D. nondisjunction during the zygote's first mitotic division.
E. fusion of the zygote with an unfertilized egg.
C
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