It is macular degeneration
Since embryo forms after fertilization, the cells that are developing will still have 2 complete sets of chromosomes or 2 genomes, having a maximum number of 2 chromosomes of the same type.
For instance 2 chromosomes 21 for instance.
Working with skeletal muscles, tendons, ligaments and joints, the bones form the moving machinery of human body. The major role of bones in movement is that they act as levers, which make use of the forces generated by skeletal muscles in a beneficial way.
