Aparent with blood type a and a parent with blood type b have children with blood type a, b and ab what type of inhertiance pattern is shown by the child with type ab blood and why?

The type of inhertiance pattern shown by the child with type AB blood is called INCOMPLETE DOMINANCE.

Explanation:

INCOMPLETE DOMINANCE is the ability of two contrasting alleles to interact and produce a heterozygous phenotype that is different from the two homozygous phenotype.

According to the principles of Mendel, genes are either dominant or recessive; the dominant expressing itself in homozygous or heterozygous state. i.e., the children should have all with blood type A or type B.

But in the case being discussed, a child with AB does not agree with Mendel's principles all because neither blood type A nor type B is fully dominant over the other, hence, type AB, a different phenotype would emerge

the man is bald so he has no hair to get wet

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

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