The dominant allele is expressed and the recessive allele is masked. This is an example of complete dominance. In heterozygous relationships where neither allele is dominant but both are completely expressed, the alleles are considered to be co-dominant. Co-dominance is exemplified in AB blood type inheritance.
swale (plural swales) 1  A low tract of moist or marshy land. 2  A long narrow and shallow trough between ridges on a beach, running parallel to the coastline. 3  A shallow troughlike depression that's created to carry water during rainstorms or snow melts; a drainage ditch.
An important distinction is that a swale is not a drain. It is a water collection device. The cheapest way to store water is in the soil. And of course, by stopping the run-off, it prevents erosion as well.all me ignorant but I have no idea what swales are. I've seen the word a lot on this site and others but have no clue as to what they are and how they prevent erosion or if that is their main function.....