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.
Â© QA International, 2010. All rights reserved. www.qa-international.com. Inside the cells of every living thing are microscopic, threadlike parts called chromosomes. They carry hereditary information from one generation to the next in the form of genes.A chromosome is made up of protein and deoxyribonucleic acid, or DNA, which is the substance that determines an organism's inherited traitsfor example, eye color in animals and flower. chromosome...(75 of 440 words). chromosome is made up of protein and deoxyribonucleic acid, or DNA, which is the substance that determines an organism's inherited traitsfor example, eye color in animals and flower. chromosome... (75 of 440 words).