XX from a female to a male may mean a so much but from what we normally use XX to mean is Love, so when a female messages you XX they simply like you and miss you and also means they love you very much that is why most cases they use a triple XXX meaning they are down for you as in they love you so much and want you. XX also means you are paired or in a relationship with them that's from a girl to a boy thus a token of them wanting you although many interpret it as a sign that she wants sex with you it only means she likes you so much.
A female is an XX. However, during development one of the X chromosomes is deactivated and is called a Barr body.Human females have XX sex chromosomes. A male has XY chromosomes. The Y chromosome is very small and contains only genes that make a male a male.
The female has xx and the male has either xx or xy
Xy=male xx=female
XX for female, XY for male
Female XX Male XY
George Sampson's head teacher is a female :) xx George Sampson's head teacher is a female :) xx
The genotype for a male is XY. A female is XX. The 23rd homologous pair is the sex gene that determines this.
Females' eggs always provide an X. If the sperm is X, the child is female (XX); if it is Y, the child is male (XY).
There are 22 autosomal chromosomes and 2 sex chromosomes in humans. In all the other chromosomes, the homologous pairs match up genetic loci. However, in human sex chromosomes the X and Y chromosome are different (with the X chromosome being much larger and the Y chromosome carrying genes that cause "maleness"). Someone with an X and a Y chromosome is a male because he has a Y chromosome that carries the genes that code for "maleness". Females "lack" this Y chromosome, and thus show characteristic female phenotypes.
XY=male; XX=female…
XX is for Female and XY is for Male.
Chromosomes effect the body by telling it if you will be male of female. XX is the chromosome for a female and XY is for male.