I believe a completely filled square represents a male affected with a disease.
A half-filled circle represents a carrier female, while a a half filled square represents a carrier male and a completely filed circle represents an infected female with a disease. Normally these are shown in a human pedigree which shows the occurrence an appearance or phenotype of a particular gene or organisms and its ancestors from one generation to the next.<span />
A molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer.
Helicase "unzips" the two strands of DNA. During DNA replication.
They are little soft bodied insect. They suck the plant's nutritious liquid and if they are in large number, they can kill the plants.
