Explain the roles of gametes and zygote in sexual reproduction.
Answer:
The two fusing gametes possess characters of their parents in their DNA. Fertilisation brings characters of both parents into one zygote cell.
Zygote is the first cell of the next generation. It divides to form an embryo which subsequently grows into a new individual.
Male gamete forming part - anther/stamen Female gamete forming part pistil/ovary/ovule