Which tissue of animals and plants exhibits meiosis?

Dear student.

Meiosis takes place in reproductive cells or germ cells.

Plants: 
Male gamete in plant is called pollen grain that contains two sperm nuclei and female gamete is called ovule that contains egg cell and two polar nuclei.

Animals: 
Male gamete in animals is called sperm and female gamete is called ova or egg.

Regards.