- 行业: Education
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Founded in 1946, Palomar College is a public two-year community college in the city of San Marcos, located in north San Diego County, California. Palomar offers over 300 associate degree, certificate programs and is designated by the U.S. Department of Education as an Hispanic-Serving Institution ...
The failure to develop a brain at the end of the spinal chord. This type of neural tube defect always causes the death of a fetus or newborn child.
Industry:Anthropology
The expression of a genetically inherited trait in different forms or degrees in different people. For example, the alleles for the Down syndrome genes may cause an effect in the phenotype of some individuals but not others. As a result, there is considerable variability within the Down syndrome population in regards to susceptibility to the characteristic unpleasant medical problems.
Industry:Anthropology
The exchange of genetic material (DNA) between homologous chromosomes at the beginning of meiosis. This results in sperm and ova with greater genetic diversity due to a recombination of genes. Specifically, a portion of the end of a chromosome is broken and reattached on another chromosome.
Industry:Anthropology
The evolution of new species from older ones. When this occurs in a single evolutionary line without branching, it is referred to as successive speciation and results in the pattern of evolution known as anagenesis.
Industry:Anthropology
The equation (p²+2pq+q² = 1) used by population geneticists to determine probable genotype frequencies of a population for specific traits. By comparing these frequencies for subsequent generations, it is possible to track the direction and rate of evolution.
Industry:Anthropology
The elevated, somewhat pointed portions of the chewing surfaces on premolar and molar teeth.
Industry:Anthropology
The earliest stone tool making traditions from the first ones made by Homo habilis down to the most advanced ones of the last Ice Age made by modern Homo sapiens. Paleolithic literally means "Old Stone" Age.
Industry:Anthropology
Anatomical features that have the same form or function in different species that have no known common ancestor.
Industry:Anthropology
The earliest stone tool making tradition. The first Oldowan artifacts were made in East Africa about 2. 5-2. 4 million years ago presumably by Homo habilis and continued to be made by early Homo erectus until about 1. 5 million years ago. They consisted of simple core (shown below) and flake tools only slightly modified from their natural state by percussion flaking.
Industry:Anthropology
The earliest stage of development of an unborn child. In humans, the embryonic stage lasts up till about the 8th week of pregnancy. Following, is the fetal stage.
Industry:Anthropology
