What's the difference between ancestry and octoroon?

Ancestry

Definition:

(n.) Condition as to ancestors; ancestral lineage; hence, birth or honorable descent.
(n.) A series of ancestors or progenitors; lineage, or those who compose the line of natural descent.

Example Sentences:

(1) Her black persona unravelled this week when Ruthanne and Larry Dolezal, a couple named on her Montana birth certificate as her biological parents, told Spokane’s KREM 2 News that her ancestry was German and Czech, with traces of Native American.
(2) As many as 7,717 babies born consecutively and 3,412 blood donors of Sardinian ancestry have been examined for the detection of the Hb J-Sardegna variant [alpha 50(CE8)His----Asp]; all subjects were from Northern Sardinia.
(3) This paper examines findings from the new ancestry question from the perspective of measuring ethnicity.
(4) The frequencies of the alleles in this population of Japanese ancestry are highly different from those of Brazilian Caucasoid blood donors but rather similar to those of Brazilian Negroid donors.
(5) Group A consists of French women of European ancestry, Group B, those born in the French Antilles of mixed ancestry, and Group C black African women with insignificant European admixture.
(6) Genetic markers in people of African ancestry and tables comparing Africans and Europeans are compiled to illustrate the blood differences.
(7) The two mutant alleles are common among caucasians of northern European ancestry; detection in genomic DNA samples of patients and carriers by hybridisation with oligonucleotides specific for the respective mutant alleles requires fractionation of restriction-enzyme-digested genomic DNA samples by gel electrophoresis.
(8) All 331 individuals were unrelated Caucasians of Danish ancestry.
(9) Furthermore, these results demonstrate that flypaper traps share close common ancestry with all other trap forms.
(10) The limited data that are available for Hispanic populations suggest that there is at least a 10-fold difference in risk between individuals of Hispanic ancestry in Colorado and Mexicans in Mexico City.
(11) 8 mature dogs of mixed sheep-dog ancestry 10-17 kg body weight were studied.
(12) An adjustment for the fact the same allele of a biallelic polymorphism may go to fixation in two inbred lines of common ancestry leads to the suggestion that in the stock from which these inbred lines were ultimately derived, there were some 11.0 percent paired and 5.3 percent unpaired polymorphisms in the average mouse.
(13) The effects of environmental exposures on the development of gastric and duodenal ulcers were investigated in a prospective study of 7,624 American men of Japanese ancestry in Hawaii.
(14) The same inversion is observed in the lymphocytes of the chimpanzee, indicating the ancestry of this inversion.
(15) Meanwhile, race was codified into laws determining that even one drop of African ancestry rendered a person legally black.
(16) The rate of change of amino acid sequence varies greatly from protein to protein, and this naturally affects how far back a given protein's ancestry can be traced.
(17) The first one comprises 57 clones that indicate relatives of nitrogen-fixing bacteria of the alpha-2 subclass of the class Proteobacteria; the second group of 7 clones originates from members of the order Planctomycetales that, however, reveal no close relationship to any of the described Planctomycetales species; 22 clones of the third group are indicative of members of a novel main line of descent, sharing a common ancestry with members of planctomycetes and chlamydiae.
(18) Major risk factors associated with cholesterol gallstone formation are American Indian ancestry, female sex, obesity, and ingestion of lithogenic drugs, such as estrogen-containing preparations and clofibrate.
(19) The Robertsonian translocation 5(13;14)(p11;q11) was studied in three families with probable common ancestry in Eastern Finland.
(20) Furthermore, close sequence similarity between BexA and BexB and products of the kpsT and kpsM genes at the Escherichia coli K5 capsulation locus (Smith et al., 1990--accompanying paper) suggests that capsulation genes in these organisms may have a common ancestry.