- 行业: Education
- Number of terms: 12355
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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 ...
A genetically inherited form of mental retardation usually resulting from the inheritance of an extra autosome 21. Down syndrome individuals also typically are short and stocky in build with short appendages. They usually have broad round faces, saddle-shaped nose profiles, and thick tongues that are often stuck out of their mouths. The incidence of Down syndrome children goes up rapidly with the age of the mother, particularly after 40.
Industry:Anthropology
A "fertilized" ovum. More precisely, this is a cell that is formed when a sperm and an ovum combine their chromosomes at conception. A zygote contains the full complement of chromosomes (in humans 46) and has the potential of developing into an entire organism.
Industry:Anthropology
A set of medical procedures to help a couple have children if they have not been able to in the past due to low sperm count, blocked fallopian tubes, and some other causes of infertility. The woman is given fertility inducing drugs to cause her to ovulate numerous ova which are surgically removed and fertilized outside of her body with sperm from her mate or another donor. Two or more of the fertilized ova are then placed into her uterus in the hope that one or more will attach and develop into viable embryos. As a result, multiple births are relatively common with IVF.
Industry:Anthropology
A rare chromosomal abnormality in which there is a trisomy of chromosome 18. This inherited condition is also called Edward's syndrome. It is characterized by severe mental retardation, a small head with malformed ears set low, and a face with a pinched appearance. Other likely defects include a cleft palate, webbed hands, missing thumbs, clubfeet, as well as heart and genitourinary defects. Individuals with trisomy 18 usually die within a few months after birth.
Industry:Anthropology
A class of substances (usually proteins) that are produced by specialized cells and that travel to other parts of the body, where they influence chemical reactions and regulate various cellular functions. Hormones include the secretions of the endocrine glands that affect metabolism and behavior. Testosterone, estrogen, and insulin are examples of such hormones.
Industry:Anthropology
A similar evolutionary development in different species lines after divergence from a common ancestor that had the initial anatomical feature that led to it. Parallelism is thought to be due primarily to the independent species lines experiencing the same kinds of natural selection pressures. Parallelism is also referred to as parallel evolution. Parallelism results in homoplasies. See convergence.
Industry:Anthropology
A group of closely related species. In the Linnaean classification system, genus is the category immediately above species.
Industry:Anthropology
A class of feminizing hormones. Both men and women produce them, but females normally produce much more.
Industry:Anthropology
A large organic molecule that stores the genetic code for the synthesis of proteins. Each chromosome consists mostly of a DNA molecule. DNA is composed of sugars, phosphates and bases arranged in a double helix shaped molecular structure. Segments of DNA correspond to specific genes.
Industry:Anthropology
A gene that can alter the expression of another gene in the phenotype of an individual.
Industry:Anthropology
