Indicate true (T) and false (F) statements below regarding gene control. Your answer would be a four-letter string composed of letters T and F only, e.g. TTFT. ( ) Development of multicellular organisms from a fertilized egg only rarely involves DNA rearrangements in specialized cells. ( ) A typical human cell expresses less than 1% of its approximately 30,000 genes at any given time. ( ) Genes that are expressed in all cell types usually vary in their level of expression in different cell types. ( ) Many differentiated plant cells can be fully de-differentiated and give rise to an entire plant.