In the red box, the pink one is female sex cell I presume and the blue one is a male sex cell.
http://prntscr.com/dsii2x Am I right? or are these chromosomes.. I'm confused.
This is law of segregation.
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The comments are very unclear and your interpretation of the figure seems very wrong (no offense). You should have a look at an intro course (such as this one by Khan Academy) as asking such intro questions here will require for one to rewrite an entire course.
The pink and blue thingies on the image are chromosomes, not gametes. A gamete is a haploid cell (we can see 4 of them at the bottom of the figure). One chromosome (say the pink one) has been inherited by the mother of the individual and the other chromosome (say the blue one) has been inherited by the father of the individual.
Let's assume that the segregation we see on the figure happens in a female individual. So, on the figure we see female diploid cells and female haploid cells. The female haploid cells are called ovules (there is a bit of oversimplification here). You can imagine the same process of segregation could occur in a male individual. The male haploid cells are called spermatozoid (there is a bit of oversimplification here). The male and female gametes might fuse to become a zygote which will develop in a new fully grown individual. The colors of the chromosomes in this scenario indicate whether the chromosome originally come from the grandmother or the grandmother of the zygote.