y-chromosome defined in 1951 yeary-chromosome - y-chromosome;
y-chromosome - The sex-chromosome found only in the heterogametic sex. Usually differs from the X-chromosome in size. Often only a short part of it with the X-chromosome at meiosis, and it usually contains few or no major genes.
near y-chromosome in Knolik
definition of word "y-chromosome" was readed 1253 times