FTO and obesity due to melanocortin 4 receptor deficiency: Among significant obesity genetic risk factors, the common single nucleotide polymorphisms (SNPs) rs9939609 and rs1421085 in the fat mass and obesity-associated (FTO) gene have been consistently reported associated with obesity in distinct populations (Chang et al., 2008; Cha et al., 2008; Fawwad et al., 2015; Babenko et al., 2019).