truetrue This image is a derivative work of the following images: File:Black_Bovan.jpg licensed with Cc-by-3.0 2010-02-10T17:56:21Z Michael Gäbler 1575x2290
grkraj.org/html/9_GENETICS.htm File:Canadian_chicken_close-up.jpg File:Black_Bovan-color-corr.jpg Date 19 March 2015 Source File:Types of sex determination