the first kind, when was it discovered?
1865 and 1866
Mendelian inheritance
Mendelian inheritance is a type of biological inheritance that follows the principles originally proposed by Gregor Mendel in 1865 and 1866, 
when are organisms considered to belong to the same species When two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction what is it classified as? UNANSWERABLE what is the main topic defined as? Biologists and taxonomists have made many attempts to define species, beginning from morphology and moving towards genetics what are the historical notes for the last word above? The observation that living things inherit traits from their parents has been used since prehistoric times to improve crop plants and animals through selective breeding name it's different kinds? Molecular genetics, epigenetics and population genetics what is the first kind of it? It is a sub-field of biology that addresses how differences in the structures or expression of DNA molecules manifests as variation among organisms what kind of different kinds does it have? Classical Mendelian inheritance, cellular biology, molecular biology, biochemistry, and biotechnology
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Mendelian inheritance [SEP] Introduction
Mendelian inheritance is a type of biological inheritance that follows the principles originally proposed by Gregor Mendel in 1865 and 1866, re-discovered in 1900 and popularized by William Bateson. These principles were initially controversial. When Mendel's theories were integrated with the Boveri–Sutton chromosome theory of inheritance by Thomas Hunt Morgan in 1915, they became the core of classical genetics. Ronald Fisher combined these ideas with the theory of natural selection in his 1930 book "The Genetical Theory of Natural Selection", putting evolution onto a mathematical footing and forming the basis for population genetics within the modern evolutionary synthesis.