They come from the same 'place' that all other Living Creatures Genes come from - Three Billion Years of Biological Evolution.
The Sex chromosomes
Humans have 46 chromosomes (23 pairs), chromosomes are long strands of genes, and since the chromosomes come in pairs, so do the genes. There are 25,000 genes in the entire human genome, and since the haploid chromosome number is 23, there are about 100's of genes on the shorter chromosomes and approximately thousands on the longer chromsomes.
Genes are located on chromosomes and not chromosomes are located on genes. genes are the basic unit of inheritance and they resides on chromosomes.
No, the genes are in the chromosomes
DNA is in genes, and genes are in chromosomes.
Genes are stretches of DNA that contain code to make proteins. Chromosomes are made up of numerous Genes.
Chromosomes contain genes which are segments of DNA.
Chromosomes carry genes. Genes are inherited material that is in chromosomes. Traits are determined by the genetic information found on chromosomes.
Since the genes are on the chromosomes, segregation of the chromosomes is also segregation of the genes.
the chromosomes carry the genes
Genes come in pairs because Genes are in chromosomes and chromosomes come in pairs as well.
The genes carried on the X and Y chromosomes are called your "sex chromosomes".