Leptos means thin and tene means thread. At this stage, the nucleus of the cell begins to increase in size. Chromosomes look like thin threads. Dehydration begins between the chromosomes. It increases the color or dye capacity of chromosomes. Chromosomes contain granular clusters called chromomeres. DNA duplicates by making its counterpart. Towards the end of this stage, the chromosomes are compressed, short, thick and visible. Nuclear membrane and nucleolus are evident. In animal cells, the ends of chromosomes and the nuclear membrane join towards the aster rays to form the attachment plate. The attachment plate looks a lot like a bouquet of flowers. Scientist Darlington called this state of chromosomes Boke stage or bouquet. When chromosomes in plant cells form bouquet-like structures, it is called synogenesis.