383 ViewsHIV/AIDS   The Meaning of HIV/AIDS The Human Immunodeficiency Virus (HIV) or Acquired Immune Deficiency Syndrome (AIDS) was first reported…

279 ViewsSEX-LINKED TRAITS   Sex–linked traits are characteristics whose genes are carried on the X chromosome of the sex chromosomes instead…

265 ViewsCHROMOSOME: THE BASIS OF HEREDITARY   LOCATION AND STRUCTURE OF CHROMOSOMES Chromatin granules (thread – like structures) found in the…

222 ViewsDETERMINATION OF THE GENOTYPE OF A DOMINANT PHENOTYPE   A dominant phenotype has the genotypic patterns RR, Rr. The genotype…

204 ViewsDIHYBRID INHERITANCE   Gregor Mendel crossed plants which differ in two pairs of contrasting characteristics e.g. seed shape (round or…

180 ViewsMENDELS WORK IN GENETICS   In the study of genetics, Gregor Mendel (1866) worked with the garden pea (Pisumsativum)  because…

181 ViewsHEREDITARY VARIATION AND CAUSES   Hereditary variation is the differences among individuals which can be passed from the parents to…

219 ViewsBIOLOGY OF HEREDITARY AND VARIATION (GENETICS)   DEFINITIONS OF GENETIC TERMS Genetics is the scientific study of heredity and variation…

216 ViewsTHEORIES OF EVOLUTION   ORGANIC EVOLUTION Organic evolution is the sum total of adaptive changes from pre–existing or old forms…

232 ViewsSOCIAL ANIMALS   Social animals are those in which individuals of the same species live together cooperatively in organized communities…