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.
In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs, called autosomes, look the same in both males and females.The 23rd pair, the sex chromosomes, differ between males and females.Females have two copies of the X chromosome, while males have one X and one Y chromosome. The 22 autosomes are numbered by size. The other two chromosomes, X and Y, are the sex chromosomes.This picture of the human chromosomes lined up in pairs is called a karyotype.he 23rd pair, the sex chromosomes, differ between males and females. Females have two copies of the X chromosome, while males have one X and one Y chromosome. The 22 autosomes are numbered by size.