Various changes take place after fertilization , including endosperm and embryo development, maturation of the ovules to form seeds and maturation of the ovary to give rise to a fruit. The zygote divides to give rise to two cells called as the terminal cell and basal cell.During terminal differentiation, a precursor cell formerly capable of cell division, permanently leaves the cell cycle, dismantles the cell cycle machinery and often expresses a range of genes characteristic of the cell's final function (e.g. myosin and actin for a muscle cell). Basal cells produce new skin cells. As new skin cells are produced, they push older cells toward the skin's surface, where the old cells die and are sloughed off.

Gamete Formation
After pollination occurs, the process of gamete formation begins in the flower. Gametes are the reproductive cells that combine during fertilization to form a new individual. In the case of flowers, the male gametes are produced in the pollen grains, while the female gametes are located in the ovules.

Pollen Grain Development
Pollen grains are produced within the anthers, which are the male reproductive organs of the flower. The process of pollen grain development, known as microsporogenesis, involves the division of diploid cells within the anther to form haploid microspores. These microspores then undergo further development to become mature pollen grains.

Female Gamete Development
Within the ovary of the flower, ovules develop. Each ovule contains a megasporangium, which produces the female gametophyte. The female gametophyte is formed through a process called megasporogenesis. Within the megasporangium, diploid cells undergo meiosis to produce haploid megaspores. One of these megaspores develops into the female gametophyte.

Pollen Transfer and Germination
Pollen transfer occurs when a pollen grain is transported from the anther of one flower to the stigma of another flower. This can happen through various mechanisms such as wind, water, or animal pollinators. Once the pollen grain reaches the stigma, it germinates and develops a pollen tube. The pollen tube grows through the style and reaches the ovary.

Fertilization
When the pollen tube reaches the ovary, it enters the ovule through a structure called the micropyle. Inside the ovule, the pollen tube releases the male gametes. One of these male gametes fuses with the female gamete, located within the female gametophyte, to form a zygote. This process is known as fertilization.

Fruit Formation
After fertilization, the ovule develops into a seed, and the ovary develops into a fruit. The fruit protects the developing seed and aids in its dispersal. As the seed matures, the fruit undergoes changes in color, size, and texture. These changes are essential for attracting animals or wind to disperse the seeds.

Overall, the changes that take place in a flower from gamete formation to fruit formation involve the development and transfer of pollen grains, the growth of pollen tubes, fertilization, and the transformation of the ovary into a fruit. These processes ensure the successful reproduction and dispersal of the flower's seeds.