Short notes
The biological basis of Life
The Biological Basis Of Life
Definition
Biological Factors Causing Subordination
Example / case study
- Studies the biological evolution and variation of human beings.
- It examines humans as biological organisms.
The Cell
Definition
~70,000 years ago → Indian & African populations had a common ancestor (proved by mtDNA studies).
Thinkers
- She did not get Nobel recognition → bias in science (WASP dominance: White Anglo-Saxon Protestant).
Dna Structure
Definition
Studies the biological evolution and variation of human beings.
Replication
Definition
A ↔ T (weak hydrogen bond, double bond).
Example / case study
- Studies the biological evolution and variation of human beings.
- It examines humans as biological organisms.
Protein Synthesis
Definition
~70,000 years ago → Indian & African populations had a common ancestor (proved by mtDNA studies).
Thinkers
- She did not get Nobel recognition → bias in science (WASP dominance: White Anglo-Saxon Protestant).
Gene
Definition
Studies the biological evolution and variation of human beings.
Example / case study
- 100 cases of cell division → 40 recombinant, 60 parent → RF = 40 / 100 = 0.4
- (110)⁶ possible combinations — hence every human has a unique HLA type.
Mutation
Definition
This is a phenomenon where the expression of a gene depends on which parent it was inherited from. Certain genes are "silenced" via DNA methylation during gamete formation.
Example / case study
- Phenylketonuria (PKU). A mutation on Chromosome 12 leads to an inability to metabolize phenylalanine, which subsequently causes intellectual disability, skin pigmentation loss, and neurological issues.
- HLA (Human Leukocyte Antigen) genes. On Chromosome 6, genes A, B, and C are linked and almost always inherited as a single unit.
- Prader-Willi Syndrome occurs if a specific segment of Chromosome 15 is deleted from the paternal side, while Angelman Syndrome results if the same segment is deleted from the maternal side.
Thinkers
- Marriage as Exchange: Lévi-Strauss used the Purum case to argue that kinship is fundamentally a system for the reciprocal exchange of women between groups, which acts as a form of social communication.
- Challenge to Descent Primacy: While British anthropologists like Radcliffe-Brown emphasized descent groups (lineages/clans) as the primary basis of social structure, the Purum system proved that marriage alliances are equally fundamental.
Chromosomes
Definition
~70,000 years ago → Indian & African populations had a common ancestor (proved by mtDNA studies).
Thinkers
- 6️⃣ Thomas Hunt Morgan (1910s) — Chromosomal Theory of Genes
Cell Division
Definition
Excessive telomere shortening or damage can impair cell function and is associated with aging and health problems.
Example / case study
- 100 cases of cell division → 40 recombinant, 60 parent → RF = 40 / 100 = 0.4