Edwards syndrome an abnormality of chromosome pair 18 In addition to the popular disease Down syndrome, there is also “Edwards syndrome (Trisomy 18)”, which is a chromosomal abnormality that is found less frequently. Edwards syndrome is an abnormality of chromosome pair 18. Normally, babies have 23 pairs of chromosomes, 2 strands per pair. However, babies with Edwards syndrome have an extra 18strand, making this pair of chromosomes 3 strands. What causes Edwards syndrome? The factors that cause babies to have this type of chromosomal abnormality can occur in mothers of […]