– The muscular pear-shaped organ (in humans, located in the lower part of a woman’s abdomen) in which the fetus develops.


– Composed of or having to do with blood vessels.


– See Whole genome amplification

Whole-genome amplification (WGA)

– A technique that allows production of enough DNA from a single cell to do multiple genetic analyses; involves nonspecific polymerase chain reaction (PCR) amplification of an entire genome, providing templates for later PCR to produce more copies of the genome.

X chromosome

– One of the two sex chromosomes, the other being the Y chromosome. Females have two X chromosomes, and males have one X chromosome and one Y chromosome.

X inactivation

– Normal inactivation of one of the two X chromosomes in females.

Y chromosome

– The chromosome that determines male gender.


– The one-cell embryo formed by the union of sperm and egg at fertilization.


1. US Department of Health and Human Services/ National Institutes of Health. Stem Cells: Scientific Progress and Future Research Directions. 2001. Online at: http://www.nih.gov/news/stemcell/scireport.htm.

2. National Bioethics Advisory Commission. Cloning Human Beings, Volume I: Report and Recommendations of the National Bioethics Advisory Commission. Rockville, MD. 1997. Online at: http://bioethics.gov/pubs/cloning1/cloning.pdf.

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