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 genes, therefore chromosomes are composed of the chemical substance called DNA (Deoxyribonucleic Acid.) The DNA that makes up the genes on the chromosome string is called coding DNA because it is responsible for all genetic characteristics which pass from one generation to the next within a species.