Some dioecious species have the XY genotype for male and XX for female. After double fertilisation, what would be the genotypes of the embryos and endosperm nuclei?

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In dioecious species with the XY/XX genotype, the male gamete (sperm) carries either an X or Y chromosome, while the female gamete (egg) carries only X chromosomes. After double fertilization, the zygote will have either an XX or XY genotype depending on which sperm fertilizes the egg. The endosperm, on the other hand, is triploid and derives its chromosomes from both the sperm and the egg nuclei, as well as a second sperm which fuses with the central cell. Therefore, the endosperm will have either XXX or XXY as its genotype, depending on which sperm fuses with the central cell. The only option that matches this is D: embryo XX/endosperm XXX or embryo XY/endosperm XXY.

Some Dioecious Species Have the XY Genotype for Male and XX