The structural abnormality of chromosome in which one arm is lost and remaining arm is duplicated is called:
b. Isochromosome(Ref: Nelson's 20/e p 590', Ghai 8/e p 637)Iso-chromosome results when 1 arm of a chromosome is lost and the remaining arm is duplicated or when the axis of division occurs perpendicular to the normal axis of division.
Ring chromosome
Isochromosome
Translocation
Mutation
Genetics And Genetic Disorders