. When sex is determined before fertilization, it is called
A. environmental.
B. syngamic.
C. epigamic.
D. progamic.
Best Answer
D. Sexes in some cases, e.g., Phyllozera, must be determined in the egg before fertilisation. This is called progamic. It is called syngamic if it is determined at the time of fertilisation as in the bee. If it occurs after fertilisation, it is epigamic.
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