UNI 月 有性生殖 Adults(2n) Juvenile(2n) Meiosis in ovaries Mitosis Meiosis in testes Zygote(2n) Fertilizatio Egg(n) Sperm(n) 有爹有妈,减数分裂,精卵结合5 有性生殖 有爹有妈，减数分裂，精卵结合