The white spots can range in size and they decorate the wings. At the upper corner of the top set of wings are orange spots. The underside of the monarch butterflies' wings can be seen when the butterfly is at rest or when it is feeding on a flower. Instead of bright orange, the underside is more drab and orange-brown. Males and females can be told apart by looking at the top of their hind wings.
Freebase(0.00 / 0 votes)Rate this definition: A genetic disorder is an illness caused by one or more abnormalities in the genome, especially a condition that is present from birth. Most genetic disorders are quite rare and affect one person in every several thousands or millions.
Genetic disorders can be grouped into three different categories. Single gene disorders result from a change or mutation in a single cell. Cystic fibrosis is an example of this type of disorder. Chromosome disorders are caused by too few or too many genes located on chromosomes, or other changes in chromosomes.