Y chromosome
| Human Y chromosome | |
|---|---|
Human Y chromosome (after G-banding) | |
Y chromosome in human male karyogram | |
| Features | |
| Length (bp) | 62,460,029 bp (CHM13) |
| No. of genes | 63 (CCDS) |
| Type | Allosome |
| Centromere position | Acrocentric (10.4 Mbp) |
| Complete gene lists | |
| CCDS | Gene list |
| HGNC | Gene list |
| UniProt | Gene list |
| NCBI | Gene list |
| External map viewers | |
| Ensembl | Chromosome Y |
| Entrez | Chromosome Y |
| NCBI | Chromosome Y |
| UCSC | Chromosome Y |
| Full DNA sequences | |
| RefSeq | NC_000024 (FASTA) |
| GenBank | CM000686 (FASTA) |
The Y chromosome is one of two sex chromosomes in therian mammals and other organisms. Along with the X chromosome, it is part of the XY sex-determination system, in which the Y is the sex-determining chromosome because the presence of the Y chromosome causes offspring produced in sexual reproduction to be of male sex. In mammals, the Y chromosome contains the SRY gene, which triggers development of male gonads. The Y chromosome is passed only from male parents to male offspring.