A medical technician while observing a human blood smear under the microscope notes the presence of barrbody close to the nuclear membrane in the $WBC$. This indicates that person under investigation is
Colour blind
Haemophilic
Normal female
Normal male
The affected individuals are short statured in disorders like
Improvement of human race by improving the environment is called
Brachydactyly is due to
Philadelphia chromosome'' is found in the patient suffering from