Philadelphia chromosome is

Which of the following conditions in humans is correctly matched with its chromosomal abnormality or linkage?

The mechanism that causes a gene to move from one linkage group to another is called

$A$ cross between a white-eyed female and a red-eyed male Drosophila gives red-eyed females and white-eyed males. Occasionally,the cross gives white-eyed females and red-eyed males. This is due to:

$A$ human female with Turner's syndrome:

Which of the following is a correct match?