Two carriers have a 25 percent chance of having an unaffected child with two normal genes (left), a 50 percent chance of having an unaffected child who also is a carrier (middle), and a 25 percent chance of having an affected child with two recessive genes (right).wo carriers have a 25 percent chance of having an unaffected child with two normal genes (left), a 50 percent chance of having an unaffected child who also is a carrier (middle), and a 25 percent chance of having an affected child with two recessive genes (right).
Top definition. flat. 1. The name given to an apartment which you rent weekly or monthly. 2. The name given to someone who is not cool and is dull and boring. 3. The name given to a woman with no or hardly any breasts. 4. Something which is level, does not decrease or increase.
A flat roof is a roof which is almost level in contrast to the many types of sloped roofs. The slope of a roof is properly known as its pitch and flat roofs have up to approximately 10Â°. Flat roofs are an ancient form mostly used in arid climates and allow the roof space to be used as a living space or a living roof.