A toolkit gene can be expressed in a different pattern, as when the beak of Darwin's large ground-finch was enlarged by the BMP gene, or when snakes lost their legs as Distal-less (Dlx) genes became under-expressed or not expressed at all in the places where other reptiles continued to form their limbs.
Foti n asuj wan gene addobat ad it waɣil s ichikil izlayan chund alwaq em n ground-finch wan Darwin isahrak BMP gene meɣ alwaq wa id ibas ilanat tachalen idaran nasnat chund Distal-less (DIx° gene tan ifanaz at waɣir meɣwar it waɣil ja daɣ ihandagan s addoben imudaran wi yadnen rattayan idaran nasan.