Large-scale mutations. 1  Copy number variation (CNV) is a type of mutation where large chunks of DNA are inserted, repeated or lost. 2  Duplication of genes. 3  Deletions of large regions of the chromosome. 4  Loss of one copy of a gene in an organism that previously had two copies.  Loss of both copies of the same gene.
Tulips are spring-blooming perennials that grow from bulbs. Depending on the species, tulip plants can be between 4 inches (10 cm) and 28 inches (71 cm) high. The tulip's flowers usually bloom on scapes with leaves in a rosette at ground level and a single flowering stalk arising from amongst the leaves.
No mischief is involved, nor are your flowers wilting. Theyre just doing what tulips do  dance in the vase, says David Caras of the Netherlands Flower Bulb Center in New York City. There are reasons tulips seem to bob and weave in the vase. Says Caras, Unlike other flowers, tulips keep growing after being cut. The movement occurs as the stems grow upward, while the large flowers respond and grow towards the light, a phenomenon known as phototropism.