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.
The skeleton makes up about 30-40% of an adultâs body mass. The skeletonâs mass is made up of nonliving bone matrix and many tiny bone cells. Roughly half of the bone matrixâs mass is water, while the other half is collagen protein and solid crystals of calcium carbonate and calcium phosphate.