Conservation of wildlife is necessary mainly because
Two unconscious patients X and Y whose blood group genotypes are AO and AB respectively were transfused with the blood from the same donor . Patient X immediately showed signs of difficulty in breathing while patient Y showed no negative reaction.
Patients X and Y were likely transferred with blood of genotype
What should the hospital have done to prevent X from showing the symptom described above? Patient X should have
The greatest contribution to genetic studies was made by
The exchange of genes between homologous chromosomes is called
