Wednesday, April 8, 2009

A Downside to Artificial Insemination

A recent article in New Scientist illustrates a downside to assisted pregnancy – in this case the sperm used to artificially inseminate a woman passed on so-called fragile X syndrome to the resulting child. The story is at:

One lesson from this is that when the family historian is looking for physical traits that might signal the source of a non-paternity event, they can be misled by recessive or ordinarily unexpressed genes that show up in the child but are not seen in the biological parent.

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