Assertion: sperm's number | /r/HasProperty | x
Facets:
Source sentences:
text: Human chromosomes are numbered 1 through 22, with the remaining chromosome, a sex chromosome, assigned a letter instead of a number – "X" or "Y." Matched copies of chromosomes – that is, chromosomes with the same assigned number, like chromosome 11 or chromosome 18 – are called homologous chromosomes, and they look the same under a microscope even if they differ at the level of their precise DNA composition.