Categories Uncategorized

I.9.3 Consanguineous and non-consanguineous mating, genetic load, genetic effect of consanguineous and cousin marriages.

Marriage between close relatives who have one or more common ancestors is called consanguineous marriage. Consanguinity is the term referred to describe the marriages between blood relatives who have one or more common ancestors. Non-consanguineous marriages are between individuals of opposite sex who do not have a known common ancestor. When the frequency of marriages […]

Read More
Categories Uncategorized

I.9.3 Causes and changes which bring down frequency – mutation, isolation, migration, selection, inbreeding and genetic drift.

Causes and changes which bring down frequency – mutation, isolation, migration, selection, inbreeding and genetic drift. According to Hardy-Weinberg Equilibrium law, the relative frequency of alleles in the population remains constant from generation to generation in a population of sexually reproducing organisms when: The population is large enough so that accident of sampling may be […]

Read More
Categories Anthropology I

I.1.6.(e) Homo sapiens — Cromagnon, Grimaldi and Chancelede.

Cro-magnon man Grimaldi Man Chancelede Man 1. Discovery old man of cromagnon, first discovered in 1868 in the cromagnon cave in france by Lartet. At Grotte Des Enfants cave, near Grimaldi village on mediterranean coast, In Italy At Rock shelter in Chancelede, Dordogne, France in 1888 2. Skeletons Woman of 30 years, Boy of 15 […]

Read More
Categories Uncategorized

I.1.4 Micro-evolution and Macro-evolution

Micro-evolution and Macro-evolution. Characters Micro-evolution Macro-evolution 1. Level of change   2. Nature of evolving category     3. Examples At the genetic level.   Variety or species.       Origin of different variety of domesticated animals. On the ground scale of geological time. Higher categories like Genus, Family, Order, Class or Phylum, so […]

Read More
Categories Uncategorized

I.9.1 D.N.A. technology and recombinant technologies.

The recombinant DNA technology also called as genetic engineering, involves artificial modification of genetic constitution of a living cell by introduction of foreign DNA through experimental techniques. Recombinant DNA technology is a major DNA-based tool in which, a gene or multiple genes can be identified, cut, and inserted into the genome of another organism. Recombinant […]

Read More