A woman with type O blood is married to a man with type B blood. Her child has type A blood
Could her husband be the father of this child? Draw a Punnett square to prove your answer

It's not possible

Explanation:

The woman's genotype is IO IO. The man's genotype is either IB IB or IB IO, which makes it impossible to get a blood type A allele, ie, IA.

The possible outcomes for this child should've been either:

IO IO × IB IB

100% IB IO- blood type B

OR

IO IO × IB IO

50% IB IO- blood type B

50% IO IO- blood type O

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.