Without enough thyroid hormone, metabolism slows, making weight gain more likely. Even a thyroid functioning at the lower end of the normal range might cause weight gain. Treating hypothyroidism with medication may reverse some of the weight gain. If you have any concerns, seek medical advice.
1 Allele: a different version of a gene. 2  Dominant: a trait that is visible and can cover up other traits when there is more than one present. 3  Genotype: the genetic makeup of an organism, or the versions of a gene that an organism has. 4  Heterozygous: having two different versions of a gene.
The genotype is the specific genetic makeup of an individual, in the form of DNA. and it codes for the phenotype of that individual. Any given gene will usually cause an observable change in an organism, known as the phenotype. However, genotype and phenotype are not always directly correlated.