The sex in Drosophila melanogaster is determined by
$X$ chromosomes
$X$ and $Y$ chromosomes
Autosomes
$X$ chromosomes and autosomes
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