Question

Nephritis is due to.

• A. Y-linked inheritance
• B. X-linked inheritance
• C. XY-linked inheritance
• D. Autosomal gene inheritance

Answer 1

The correct option is C XY-linked inheritance

The genes which are XY linked are present on the homologous sections of X and Y chromosomes. They can undergo pairing and consequently can cross over from X to Y and vice versa. They are not linked permanently either to X or Y and hence called incompletely linked (XY linked) genes. Their inheritance pattern is like that of the autosomes as they undergo cross over. These two segments of X and Y are homologous and can undergo cross over. A male with the bobbed gene b on the X chromosome may be normal when it has the normal B gene in the Y chromosome. Epidermolysis bullosa, Retinitis pigmentosa (progressive degeneration of the retina, accompanied by pigment deposition in the eye) certain forms of nephritis, spastic paraplegia etc., are known to the XY linked genes.

So, the correct answer is 'XY-linked inheritance'.