Awoman gives birth to a son who has type a blood. she has type ab blood. which of the following can be concluded from this about her parents' blood types?

one of her parents had at least one a allele and the other at least one b allele.
one of her parents had type ab blood.
one of her parents had type b blood and the other type a blood.
one of her parents had two a alleles.

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs