Blood Type

Blood type is surely related to us deeply, isn't it? But, what kind of relationships are there between blood type and heredity?

Blood type is closely related to heredity.

Children inherit blood type from their parents.
Classification of blood type recognises over 300 kinds, but we explain how it is inherited with the ABO-style classification!

Blood has 4 main types. There are types A, B, O and AB. And, there are A, B, O genes carrying. Also, A, B, O are called “multiple alleles” as they are opposed to each other. A blood type is expressed in this way by a list.

Type A	AAorAO
Type B	BBorBO
Type O	OO
Type AB	AB

A, B are dominant genes, O is a recessive gene. There is no relationship of relative merits in A and B.

You can understand the blood type of the child by the genotypical pattern combination of the parents!

In this case, both parents are type A.

FatherAAMotherAA
	A	A
A	AA	AA
A	AA	AA

FatherAAMotherAO
	A	O
A	AA	AO
A	AA	AO

FatherAOMotherAA
	A	A
A	AA	AA
O	AO	AO

FatherAOMotherAO
	A	O
A	AO	AO
O	AO	OO

So, the child’s blood type could be any one of AA, AO or OO. Therefore, the child could be either type A or type O.

In this case, parents are type A and type B.

FatherAAMotherBB
	B	B
A	AB	AB
A	AB	AB

FatherAAMotherBO
	B	O
A	AB	AO
A	AB	AO

FatherAOMotherBB
	B	B
A	AB	AB
O	BO	BO

FatherAOMotherBO
	B	O
A	AB	AO
O	BO	OO

FatherBBMotherAA
	A	A
B	AB	AB
B	AB	AB

FatherBBMotherAO
	A	O
B	AB	BO
B	AB	BO

FatherBOMotherAA
	A	A
B	AB	AB
O	AO	AO

FatherBOMotherAO
	A	O
B	AB	BO
O	AO	OO

So, the child’s blood type could be any one of AO, BO, AB or OO. Therefore, the child could be type A, type B, type AB or type O.

In this case, parents are type A and type AB.

FatherAAMotherAB
	A	B
A	AA	AB
A	AA	AB

FatherAOMotherAB
	A	B
A	AA	AB
O	AO	BO

FatherABMotherAA
	A	A
A	AA	AA
B	AB	AB

FatherABMotherAO
	A	O
A	AA	AO
B	AB	BO

So, the child’s blood type could be any one of AA, AO, BB, BO or AB. Therefore, the child could be type A, type B or type AB.

In this case, parents are type A and type O.

FatherAAMotherOO
	O	O
A	AO	AO
A	AO	AO

FatherAOMotherOO
	O	O
A	AO	AO
O	OO	OO

FatherOOMotherAA
	A	A
O	AO	AO
O	AO	AO

FatherOOMotherAO
	A	O
O	AO	OO
O	AO	OO

So, the child’s blood type would be any one of AO or OO. Therefore, the child will be either type A or type O.

In this case, both parents are type B.

FatherBBMotherBB
	B	B
B	BB	BB
B	BB	BB

FatherBBMotherBO
	B	O
B	BB	BO
B	BB	BO

FatherBOMotherBB
	B	B
B	BB	BB
O	BO	BO

FatherBOMotherBO
	B	O
B	BB	BO
O	BO	OO

So, the child’s blood type might be any one of BB, BO or OO. Therefore, the child would be either type B or type O.

In this case, parents are type B and type AB.

FatherBBMotherAB
	A	B
B	AB	AB
B	AB	BB

FatherBOMotherAB
	A	B
B	AB	BB
O	AO	BO

FatherABMotherBB
	B	B
A	AB	AB
B	AB	BB

FatherABMotherBO
	B	O
A	AB	AO
B	BB	BO

So, the child’s blood type may be any one of AO, BB, BO or AB. Therefore, the child will be type A, type B or type AB.

In this case, parents are type B and type O.

FatherBBMotherOO
	O	O
B	BO	BO
B	BO	BO

FatherBOMotherOO
	O	O
B	BO	BO
O	OO	OO

FatherOOMotherBB
	B	B
O	BO	BO
O	BO	BO

FatherOOMotherBO
	B	O
O	BO	OO
O	BO	OO

So, the child’s blood type could be any one of BO or OO. Therefore, the child would be either type B or type O.

In this case, both parents are type AB.

FatherABMotherAB
	A	B
A	AA	AB
B	AB	BB

So, the child’s blood type may be any one of AA, AB or BB. Therefore, the child could be type A, type B or type AB.

In this case, parents are type AB and type O.

FatherABMotherOO
	O	O
A	AO	AO
B	BO	BO

FatherOOMotherAB
	A	B
O	AO	BO
O	AO	BO

So, the child’s blood type will be any one of AO or BO. Therefore, the child might be either type A or type B.

In this case, both parents are type O.

FatherOOMotherOO
	O	O
O	OO	OO
O	OO	OO

So, the child’s blood type can only be OO. Therefore, the child must be type O.

The blood type is inherited according to Mendel’s laws, too.
Mendel’s laws are unexpectedly influencing you.

I was surprised about the blood type is inherited according to Mendel’s laws!

Yeah! Mendel’s laws are unexpectedly near, right?

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