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 alleles that make up the genes of an organism, known collectively as a genotype, exist in pairs that are identical, known homozygous, or mismatched, known as heterozygous.When one of the alleles of a heterozygous pair masks the presence of another, recessive allele, it is known as a dominant allele.Understanding genetic dominance, from its discovery to its related variations, is an important step in the overall comprehension of the transmission and expression of genetic material.he alleles that make up the genes of an organism, known collectively as a genotype, exist in pairs that are identical, known homozygous, or mismatched, known as heterozygous.