Two diploid gametes may fuse to give a tetraploid zygote, or gamete may develop directly by parthenogenesis.
Two diploid gametes may fuse to give a tetraploid zygote, or gamete may develop directly by parthenogenesis.
两个二倍体配子融合可能产生一个四倍体合子，这样的配子也可以通过孤雌生殖直接发育而来。