Genetic inheritance is biological inheritance. This post will briefly summarize genetic inheritance. We are creatures of genetic transmission. Teilhard de Chardin said, “biological (organic) inheritance is based on the transmission of genetic information in humans very much the same as in other sexually reproductive organisms.” (1961) Our genetic code (DNA) of spiral energy will reflect the parental inheritance we are born with. Biological-genetic inheritance is basically DNA memory that passes from generation to generation. DNA is cumulative from familial past generations –—> parents, grandparents, great grandparents, etc. Genetic inheritance is biologically based and springs from Nature. Genes entail a lot of things, but they are especially concerned with survival and reproduction.
Genetics is just an exceptional branch of biology. Genetics concerns cells and how cells use genes as a blueprint. Every cell has a genetic code or blueprint (instructions for life). I like and endorse Richard Dawkins view of genes as not so much a blueprint, but more as a recipe of genetic instructions. Genes are the material that we inherit in pairs from both parents. Genes are stretches of DNA that have a recipe to make protein. The genetic code recipe is a straight-line written formula of 3-letter words that are digitally displayed. Incredibly, a genetic code of 3-letters is the same for all of life from simple bacteria to human beings. DNA’s double-helix ladder is a sequence bases for organic life no matter the form life takes. DNA’s spiral-staircase structure has 2-helical strands that make for its backbone. The 2-strands make possible cell division, duplication, and heredity. Genes are replicators –—-> they reproduce themselves. There is a constant number of genes per species. However, the genetic code has a universality of genes we share with other living creatures like bacteria, plants, birds, fish, dogs, etc. There is a universal core genome for all biological cells.
Genes reside on chromosomes; i. e. genes are physically planted on chromosomes. Genes reside on a predictable location, or loci on various chromosomes. Chromosomes are those rod shaped bodies that carry the genes, and DNA is the basic material of genes. Each human cell nuclei has 46 chromosomes divided into 23 pairs (½ male and ½ female). Chromosomes are ordered according to size (chromosomes 1-22) with #1 being the largest and #22 the smallest. Chromosome #23 is the sex chromosome where the female has two large XXs and the male has one X and one small y. Humans amazingly have 25-30,000 genes jam-packed into every chromosome for each cell.