thanks for stopping by today we're talking about dominant alil versus recessive alil if you don't quite remember what an alil is watch my video on genes versus alil Linked In the description below all right every organism has at least two alil for every Gene two for eye color two ails for horn size Etc right two ails for every trait that it has in the simplest scenario these Al have a dominant and recessive relationship which means that uh one form of the AL the dominant alil is expressed over the other form the recessive right we often show this relationship using the alphabet so uppercase letters refer to a dominant alil while lowercase letters refer to the recessive alil so let's look at an example let's say cat fur color can be orange or gray orange being dominant and gray being recessive the first thing we want to do is select a letter to represent the alyss the the letter you choose is not important so long as you can distinguish between the uppercase and the lowercase form of that letter right so let's choose the letter F since we're doing with fur color so in this example the big F or the capital F would be dominant or orange and the lowercase f would be gray or recessive and there are three different pairings of these two alyss right you could have two dominant alyss a big F and a big F in which case the fur is orange or you could have two recessive Al a little F and a little f in which case the fur is gray or you could have one of each a big F and a little f um the order doesn't matter here when there's one of each in this last case the fur would be orange because the dominant trait is always expressed over the recessive in in this type and that's it for dominant versus recessive alil if you have any questions throw them in the comments and be sure to stay tuned for my next videos on homozygous and heterozygous ails and genotypes versus phenotypes thanks for watching and we'll catch you next time