What would you like to do?
Answer xx is girl xy is boy
An xx and an xy cell are used to denote female and male zygotic cells, respectively. They are formed from the union of a female x egg and a male x or y sperm.
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 chrom…osomes 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.
First of all, you're mistaken if you asked yourself this question: XX is the female sex chromosome combination, and XY is male. It's important to realise that this… is the case in humans, but not in all animals. Other animals, for example insects, have different mechanisms for sex determination. In humans, a fertilised egg cell will divide a few times. Then each cell will turn off all but one of its X chromosomes (the phrasing is because in rare cases a fertilized egg can end up with three or more X chromosomes). This is possible and necessary because one X is sufficient to produce the proteins encoded on it, hence two active X would result in twice the amounts needed. If you now wondered whether an embryo can also survive and grow to adulthood with only one X and no other sex chromosomes, you are correct. This is called monosomy X and causes a condition known as Turner syndrome. Any human with only X chromosomes will be female. The Y chromosome, which is much smaller than the X chromosome, carries some additional genes whose influence will set off several mechanisms which ultimately lead to the development as a male instead. A Y chromosome alone cannot sustain life as it does not contain many of the vital genes which are located on the X chromosome.
XX are the sex defining chromosomes for a girl and XY for boys
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 chro…mosomes. The Y chromosome is very small and contains only genes that make a male a male.
Men are XY.
XX and XY is the male-female cross in humans and some other organisms. XX= female, XY= male.
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).
this means that the same genetic code that is used in humans is used in all other types of organisms as well. anything from animals to plants to bacteria uses the same system …of triplet nucleotide bases (codons) to code for a single amino acid when building a polypeptide. remember that the genetic code is also degenerate- each codon only codes for one amino acid, but there can be several different codons that call for the same amino acid.
it means that they checked the knife and everything about it twice. So it should never have any mistakes. It turned into the logo for case knives today.
XX are the female chromosomes and XY are the male chromosomes.
XX XY - 2002 is rated/received certificates of: Germany:16 UK:15 USA:R
XX XY - 2002 was released on: USA: 11 January 2002 (Sundance Film Festival) USA: 10 October 2002 (Austin Film Festival) USA: 15 October 2002 (New Orleans Film Festival) … USA: 15 November 2002 (AFI Film Festival) USA: 27 March 2003 (Wisconsin Film Festival) USA: 5 April 2003 (Philadelphia International Film Festival) USA: 11 April 2003 (limited) Portugal: 18 July 2003 UK: 24 October 2003 Finland: 2004 (DVD premiere) Spain: 27 August 2004 Sweden: 1 September 2004 (DVD premiere) Greece: 28 November 2006 (DVD premiere) Finland: 1 November 2008 (TV premiere) Germany: 11 January 2012 (TV premiere)