Mutation that occurs due to addition of a part of chromosome so that gene(s) is/are represented twice, is called

Substitution of a purine base with a pyrimidine base or vice versa is called

Drones do not have _(i) and thus cannot have (ii), but have a (iii) and can have _(iv)_ The correct words for (i), (ii), (iii) and (iv) respectively are

Select correct option w.r.t trisomy aneuploidy

Who is considered as 'father of actinobiology"?

In paracentric inversion

Environmental mechanism of sex determination is observed in all of the following, except

Porcupine skin is a

Select odd one w.r.t sex limited traits

In case of chronic myelogenous leukemia, which one of the following is called "Philadelphia chromosome"?