In humans, y is so small as to be insignificant in these terms. ChrX is much larger. Also, the combination of the remaining chr1-22 are much larger than chrX by

In humans, y is so small as to be insignificant in these terms. ChrX is much larger. Also, the combination of the remaining chr1-22 are much larger than chrX by itself, so these numbers don’t factor in as much as you’d think. Rough scale example: XXXXXXXXXXXXXXXXXXXXXXX YY