Genetic recombination refers to the process by which two DNA  molecules exchange genetic information. The three types of genetic  recombination are crossing over, conservati â¦ ve site-specific  recombination and transpositional recombination.
This produces a crystal lattice, which is commonly known as 'ice'. Ice floats because it is about 9% less dense than liquid water. In other words, ice takes up about 9% more space than water, so a liter of ice weighs less than a liter water. The heavier water displaces the lighter ice, so ice floats to the top. One consequence of this is that lakes and rivers freeze from top to bottom, allowing fish to survive even when the surface of a lake has frozen over.
Familiarity information: FLOAT used as a noun is common. â¢ FLOAT (verb) The verb FLOAT has 9 senses: 1. be in motion due to some air or water current 2. be afloat; stay on a liquid surface; not sink 3. set afloat 4. circulate or discuss tentatively; test the waters with 5. move lightly, as if suspended 6. put into the water 7. make the surface of level or smooth