Are Fish Xy Or Zw Chromosomes?
Are Fish Xy Or Zw Chromosomes? Morphologically differentiated sex chromosomes have been identified only in about 10% (176 species out of 1700 species) of fish studied karyologically [15]. These include ZW and XY systems with eight different variants [16], among which male heterogamety is twice as common as female heterogamety. What type of chromosomes do