Answer : The correct answer is -
a. the transmission of genetic characteristics from parents to children.
Heredity can be described as the transfer of particular traits /characteristic of parents to their offspring in the form of genetic material (DNA, deoxyribonucleic acid).
In other words, the transfer of genetic information (that determines particular traits) from one generation to the next generation is called heredity.
Genes (segment of DNA that codes for particular protein, which depicts specific trait) are considered as the unit of heredity.
Thus, option a) is the right answer.
