The whole of a person's DNA, called the genome, consists of components called nucleotide bases. The bases link together to form a series of base pairs, and the sequence of base pairs codes for thousands of genes required for growth and survival....
When a child is mentally challenged, delays in normal development are experienced. The level of impairment can be mild, with the child having an IQ between 52 and 69. In more severe cases, the IQ can be as low as 20 to 35, according to the "Merck...
Chromosomes are long sequences of DNA, containing the genes of an organism. Chromosomal diseases result from errors in the number of chromosomes or the physical structure of the chromosomes. According to the March of Dimes, about 1 in every 150...
Conception and pregnancy are complicated; many systems must work perfectly or problems with the fetus can occur. Problems that occur at conception are usually caused by chromosomal errors or abnormalities and can't be avoided. Fetal malformations...
Genes are the portion of DNA that determine traits such as eye color or height. Genetic disorders may run in families. A child may inherit a specific eye disease such as Stargardt's disease or a complex developmental disorder such as Turner's...
Newborn heart problems are more common than you would expect. According to the American Heart Association, nine out of every 1,000 babies in the United States are born with a congenital heart defect. Although most congenital heart defects are...