The sex in Drosophila melanogaster is determined by

Which of the following is an inherited trait in man

Two offspring developed in the same uterus but from fertilization of two different ova are

A hereditary disease which is never passed on from father to son is

$A$ : Polyploids with odd number of chromosomes are propagated vegetatively.
$R$ : Seed formation is absent due to meiotic abnormality.

Kappa particles indicate