When linked characters or genes are inherited together through two or more generations, it is called

$A$ : Myotonic dystrophy is caused by recessive mutant pleiotropic gene.
$R$ : Gene mutation leads to more synthesis of fibrillin proteins.

The barr body is observed in

In Lathyrus odoratus, hybrid blue flowered and long pollen plant is test crossed with homozygous recessive red flowered and round pollen plant then how many parental types are obtained when genes are present in cis stage in parents?

Which of the following trait shows transmission from carrier female to male progeny?