Considering that the sickle cell allele is recessive, give a probable genotype for the patient

The probable genotype of the patient is a homozygous recessive allele (SS)

Explanation: Sickle cell is a recessive disorder, therefore it must occur in a homozygous state in order to manifest phenotypically. When it occurs in a heterozygous state AS, the dominant allele A will overshadow its effect. Sickle cell is a genetic disease caused by abnormal haemoglobin in the blood which gives the red blood cells a sickle shape denoted as S. A normal haemoglobin gives the red blood cells a disc shape and its denoted by A.

the tricuspid valve is present between right atrium and right ventricle