Essay Database

In humans, several hundred genetic diseases and disorders follow the dominant-recessive pattern. If a child inherits one dominant allele and one recessive allele he or she typically does not have the disease. A carrier can pass either the dominant or recessive allele to their child. It can receive a mutated allele from the mother and a normal allele from the father, or a normal allele from the mother and a mutated allele from the father. …

…extremities resulting from absorption of cartilaginous tissue during the fetal stage. Hypochondroplasia, another form of achondroplasia; spinal tuberculosis; and deficiency of the secretions of the pituitary gland or of the ovary. Geneticists have recently found the gene responsible for achondroplasia and hypochondroplasia, the most common forms of dwarfism. Treatment of cretinism with thyroxine or thyroid extract early in infancy results in normal growth and development. Pituitary dwarfism is successfully treated by administering human growth hormone.