The presence of a gene on the Y chromosome.
Y-linkage is analogous to X-linkage (the presence of a gene on the X chromosome) in that it says a gene is on one of the sex chromosomes.
It has often been said that little is known about Y-linkage. This is no longer true. As of the year 2000, a number of genes were known to be Y-linked including:
* ASMTY (which stands for acetylserotonin methyltransferase),
* TSPY (testis-specific protein),
* IL3RAY (interleukin-3 receptor),
* SRY (sex-determining region),
* TDF (testis determining factor),
* ZFY (zinc finger protein), PRKY (protein kinase, Y-linked),
* AMGL (amelogenin),
* CSF2RY (granulocyte-macrophage colony-stimulating factor receptor, alpha subunit on the Y chromosome),
* ANT3Y (adenine nucleotide translocator-3 on the Y),
* AZF2 (azoospermia factor 2),
* BPY2 (basic protein on the Y chromosome),
* AZF1 (azoospermia factor 1),
* DAZ (deleted in azoospermia),
* RBM1 (RNA binding motif protein, Y chromosome, family 1, member A1),
* RBM2 (RNA binding motif protein 2) and
* UTY (ubiquitously transcribed TPR gene on Y chromosome).
