Question

♥♥Hey♥♥ Please don't Copy paste ⚠ In one family of four children, each has a different blood group. Their mother has blood group B and father has blood group A. Work out a cross to explain how is it possible. Class 12 CBSE

Answer 1

Answer:

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Explanation:

A cross is carried out between the heterozygous father (for blood group B) and the heterozygous mother (for blood group A) to get four children with different blood groups.

All the four blood groups are controlled by three allelic genes IA, IB, i which exhibit an instance of multiple allelism.  Both IA and IB are dominant over i. However, when together, both are dominant and show the phenomena of co-dominance, forming the blood group AB. Six genotypes are possible with the combination of these three alleles.