Genes aren't just found in humans — all animals and plants have genes, too.genes play an importnt role in determining physical traits — how we look —and lots of other stuff about us. They carry information that makes you who you are and what you look like: for example.. curly or straight hair, long or short legs, even how you might smile or laugh. Many of these things are passed from one generation to the next in a family by genes.
genes carry the information that determine ur traits , which are features or charactrstics tht are passed on to u or inherited from ur parents..
for example..if both of ur parents have blue eyes..thn u might inherit the trait for blue eys frm them.
Gametes are the reproductive cells used during sexual reproduction to produce a new organism called a zygote.

Both the male and female gametes are formed during a process of cellular reproduction called meiosis. During meiosis, the DNA is only replicated or copied one time. However, the cells are divided into four separate cells. This means that the new gamete cells have only half of the number of chromosomes as the other cells. So, during meiosis DNA or chromosomes are copied, then split into two cells (with one full set of chromosomes each), then again split into two more cells, leaving only half of the pairs of chromosomes in each new cell.


These new cells with only half of the chromosomes will mature into the gametes. 

genes are the segments of a DNA molecule .genes are located on is responsible for characteristic features of a living being.
hope it helpd:)
A gene is a stretch of DNA that codes for a type of protein that has a function in the organism. It is a unit of heredity in a living organism. All living things depend on genes. Genes hold the information to build and maintain an organism's cell and pass genetic traits to offspring.

Gamete formation :
The purpose of meiosis is to produce gametes or sex cells. The production of gametes by meiosis is called gametogenesis ( gameto- srx cell, genesis - creation). In males, the gamete sperm is produced and this is called spermatogenesis (spermato- sperm, genesis- creation). In females, the gamete egg is produced and this is called oogenesis ( oo- eggs( or oocyte) genesis -creation ).