Each gene has a specific location (locus) on a chromosome and may come in several forms (alleles). genotype The actual genes for a trait present in an individual. genotypic ratio The expected numbers of different genotypes produced by a particular cross.
Bones are made from calcium. A typical bone has an outer layer of hard or compact bone, which is very strong, dense and tough. Inside this is a layer of spongy bone, which is â¦ like honeycomb, lighter and slightly flexible.
Bone is made up of an organic part and an inorganic part. Almost every bone in your body is made of the same materials: 1  Organic-this is also known as the osteoid. 2  It consists of 90% collagen and other specialised proteins such as osteocalcin and osteonectin. 3  It gives the bone a degree of flexibility.