To South Africans the Braai is as important an implement in the household as an oven is to us Brits. Simply put, a Braai is a wood or charcoal fuelled barbecue, but more than that it is an incredibly versatile and exciting way to cook which provides a great social hub for a gathering or celebration!o South Africans the Braai is as important an implement in the household as an oven is to us Brits. Simply put, a Braai is a wood or charcoal fuelled barbecue, but more than that it is an incredibly versatile and exciting way to cook which provides a great social hub for a gathering or celebration!
Humans normally have 46 chromosomes, which come in 23 pairs, as well as some mitochondrial DNA. From the mitochondrial DNA, and 22 of the 23 other chromosome pairs, there is nothing to tell you whether the DNA came from a male or a female. The genetic difference between males and females resides in that last chromosome pair, the sex chromosomes. At the sex chromosomes, women have two X chromosomes, while men have one X chromosome and one Y chromosome. So, if you have a discrete source of your DNA sample, like a hair, you could do a couple of things. You could test it for the presence of Y-chromosome genetic material.
The behaviour of this X chromosome in males is different from those in the female chromosome. The female chromosome has more working genes than the male one. It is known to have more than 1000 working genes while the male chromosome has less than 100. Of these 1000 working genes, 200 to 300 are gender specific while the remaining are shared across the two genders.