Genetics directly determine the chromosomal structure and the
development of genes.
- Imbalance in hormones- The imbalance in the hormone can
directly affect mood swings and emotions. These mood swings can
affect the behavior of individuals. For instance, a low mood can
make person sad, irritated, or showing aggressive behavior.
- Brain development- Abnormal blood development can affect the
behaviors of individuals. The abnormal functioning of brain
structures or imbalances in neurotransmitter activities. For
instance, the damaged hippocampus can create memory problems or
high levels of dopamine make person hallucinate.
- Physical abnormality- People might develop deficiency or become
physically handicapped. For instance, A person who is dwarf might
not do many activities or physically handicapped person might find
it difficult to climb stairs.
- Internal abnormality- The development of various illnesses and
diseases that can be associated to genetics. For instance, the
development of cancer or diabetes makes the person take extra
precautions like taking a good diet, exercise, etc.