Question: Are all twins the same gender?, Answer:No, Description of Twin: One of two offspring produced in the same pregnancy. Use with P31 on items for one twin, Fact1: Identical twins are always the same gender., Fact2: However, identical twins are very rare. Most twin cases are formed from two different fertilizations during the same conception event., Fact3: Non-identical twins can be opposite gender or same gender.
Step1: Which kind of twins are usually of the same gender?, Step2: Are there other kind(s) of twins apart from #1?, Step3: Are #2 also usually of the same gender?, Wikipedia page for step 1: Twin, Wikipedia page for step 2: Twin, Wikipedia page for step 3: , not_definitive_answer: False, incorrect_answer: False