Question

In the maternity ward, Mrs. Bright and Mrs. Light share a room. When they were ready

to go home, Mrs. Bright insisted that she had been given the wrong baby. The babies
looked very much alike, and unfortunately, no one could find a record of the babies'
footprints. Hospital officials told Mrs. Bright she was mistaken, and sent her and the
baby home. Mrs. Bright eventually asked the hospital to perform identification tests.
Several weeks later, the blood tests showed the following data.
Family Member Blood Type Family Member
Blood Type
Mrs. Bright
Group AB Mrs. Light
Group A
Mr. Bright
Group O
Mr. Light
Group A
Baby at Bright's House Group O Baby at Light's House Group A
What is Mrs. Light's phenotype?

Answer 1

Mrs. Light's phenotype is Type A as per her blood group result. She cannot donate blood to her husband if he is Type O, but Mr. Light can donate to her as they both have Type A blood.

Step-by-step explanation:

Mrs. Light's phenotype in terms of ABO blood group system is Type A. This can be inferred from the blood tests results which indicate her blood type as Group A. The possible phenotypes for the offspring of a couple with her blood group and her husband's blood group, both being Group A, include Group A and Group O, considering that they may both have the genotype AO, allowing for a possibility of an OO genotype in their offspring, which is Type O blood.

Concerning blood donation, Mrs. Light cannot donate blood to her husband if he is Type O (genotype ii), as Type O individuals can only receive blood from other Type O individuals due to the lack of A and B antigens. However, since she is Type A, she can donate to other individuals who are Type A or AB due to the presence of the A antigen.

On the other hand, Mr. Light can donate blood to Mrs. Light, as Type A blood can safely be received by individuals with Type A blood.

Answer 2

the wrong type for her baby.