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what are the possible blood types of an offspring of a cross between an individuals that are type AB and type O blood?

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Answer:

A or B

Explanation:

AB is dominant 'o' is recessive

Drawing the punnet square :

______ A _____ B __

_ o ___ Ao ____ Bo

_ o ___ Ao ____ Bo

_________________

Here, the 'o' allele is recessive, therefore the A B allele overshadows the 'o' allele,

Hence, the possible blood group types the offsprings could have is ;

A, A, B, B. Meaning that each offspring will have a 50 - 50 chance of being in the A or B blood group.

There will be no possibility of the offsprings belonging to the AB or o blood group.

The punnet square depicts the possible outcome.

The possible blood types of offspring of a cross between individuals having type AB and type O blood are type A (50%) or type B (50%).

  • The ABO system is a gene system (locus) that encodes for three different alleles called A, B and O.

  • The A and B alleles are dominant over the O allele. whereas both A and B alleles are codominant.

  • In this case, one parent can only produce one type of gamete carrying the O allele, whereas the other parent can produce two types of gametes in equal proportion, 50% type A gametes and 50% type B gametes.

  • In consequence, offspring of this cross has a 50% of chance of having a type A blood (genotype heterozygous AO) and a 50% of chance of having type B blood (genotype heterozygous BO).

In conclusion, the possible blood types of offspring of a cross between individuals having type AB and type O blood are type A (50%) or type B (50%).

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