Answer:
Explanation:
he mechanisms of inheritance are completely independent of trait dominance
Inheritance is a function of where the gene for the trait is located (nuclear genome, mitochondrial genome, plasmid in bacteria..) and how the host organism reproduces (sexual reproduction, asexual reproduction, horizontal gene transfer, viral integration ...)
E.g. a normal human gene in the nuclear genome gets inherited from both parents, or from only the mother if you are a guy and it is a gene on the X chromosome. A gene on the mitochondria is inherited only through the mothers, while a gene on the Y chromosome is inherited only through the fathers.
Bacteria can do asexual reproduction, making a near perfect copy of their own genome to pass on, or can acquire genes from other bacteria through horizontal gene transfer.
Dominance is a function of what the gene does and what trait you are looking at.
A classic example is the sickle cell anemia allele, which is recessive (you need 2 copies to get anemia). However, it is dominant for resistance to some forms of malaria (you only need one copy to be resistant). It is incompletely dominant for the trait of sickle-ing of the blood cells, as heterozygotes only cause sickle-ing under low blood oxygen concentration.
For ABO blood groups, the A and B alleles are co-dominant since they cause the production of two different antigen types. The O allele does not make any antigens, so it is recessive to both of them.
An AB individual will make both A and B antigens, so they are co-dominant, while an AO individual will make only A antigen, so A is dominant and O is recessive.
Basically, you just need to look at what the allele is doing physiologically to the cell / organism to figure out why the dominance pattern is they way it is.
