The "cri-du-chat" syndrome is caused by change in chromosome structure involving
Deletion
Duplication
Inversion
Translocation
$A$ : Antlers in male deer are sex influenced traits.
$R$ : These are controlled by autosomal genes which are influenced by the sex of bearer
Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child ?
Which of the following is not a hereditary disease?
Normally $DNA$ molecule has $A-T, G-C$ pairing. However, these bases can exist in alternative valency status, owing to rearrangements called
Gynaecomastia condition can develop due to