Why are mutations recessive? Is recessive a more appropriate answer to incompletely dominant?
- Thread Starter
- 23-07-2017 18:21
Last edited by games211; 23-07-2017 at 18:39.
- 23-07-2017 18:37
- 23-07-2017 18:45
Who said mutations were recessive?
- 23-07-2017 18:54
Because the genotype is new! But it shouldn't be it probably is the various forms of dominant.
- 24-07-2017 12:18
Some diseases-take Huntington's disease-are dominant disorders. Thankfully most of the cases are known in each country and are carefully managed to ensure they reduce the chance of having children with it.
And this is just a disease context...im sure someone could give you phenotypic, non pathogenic characteristics caused by dominant mutations.
Recessive inheritance and incomplete dominance are very different things. You may be familiar with co-dominance in inheritance....there are two types of rose plant, if i remember right, that are white and red-when you breed them, they make pink flowers. This is because the colour determining alleles (white and red) don't dominate each other, so an "intermediate" phenotype is made-in this case, pink.
Incomplete dominance is more similar to that. Its when this kinda happens, but one of these alleles is slightly more dominant in determining the phenotype. In this example....you'd probably see this as really faint pink flowers (if white had incomplete dominance over red) or flowers that were slightly less red than red roses (if red has incomlete dominance over white).
In the whole dominant-recessive scheme of things.....if an allele is recessive, it has an allele that is COMPLETELY dominant over it.