Question

One thousand pair of twins attended a twin competition. eight hundred of these twins were like sexes( male/male and female female) the remaining two hundred pairs were unlike sexes(male/female).what percentage of these twins is monozygotic and what percent is dizygotic?

Answer 1

As per the question, total twins were 1000 out of which 800 were like sexes and 200 twins were unlike sexes. As Monozygotic twins deveop into similar sex,the percentage of them=800/1000 x 100 =80%. The Dizygotic twins=200/1000 x 100=20%