Human evolution

Human evolution

Otherwise known as anthropogeny; anything of or relating to the study of the origin and evolution of Homo sapiens as a distinct species from other hominids, great apes and placental mammals.

Industry: Archaeology

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Human evolution

X chromosome-autosome balance system

Archaeology; Human evolution

A genotypic sex determination system. The main factor in sex determination is the ratio between the numbers of X chromosomes and autosomes. Sex is determined at the time of fertilization, and sex ...

A human clinical syndrome that results from disomy for the X chromosome in a male, which results in a 47,XXX male. Many of the affected males are mentally deficient, have underdeveloped testes, and ...

Prophase I

Archaeology; Human evolution

The first stage of meiosis. There are several stages of phophase I, including leptonema, zygonema, pachynema, diplonema, and diakinesis.

Romer's Rule

Archaeology; Human evolution

The generalisation that new adaptations are often allowed by evolutionary changes that initially better adapt a species to its old way of life.

Cope's Rule

Archaeology; Human evolution

The generalisation that there is a steady increase in size in phyletic series.

F1 generation

Archaeology; Human evolution

The first filial generation produced by crossing two parental strains.

Meiosis I

Archaeology; Human evolution

The first meiotic division that results in the reduction of the number of chromosomes. This division consists of four stages: prophase I, metaphase I, anaphase I, and telophase I.