Other Genetic Principles
21 - 30 of 33 Answers
February 20, 2009:
What are the traits called when they skip 2 generations and appear on the 2nd? Like for example my grandparents have it and it skips my parents and comes up in me. What's that called? Is there such a thing as a dead trait that only appears once and is gone forever...
May 29, 2008:
I am curious if there is any evidence that a gene is more likely to be passed on if it is turned on. Also, is an on gene more likely to be affected by mutation?
March 20, 2008: What causes the alleles in the genes to be turned off in certain areas of the body where they are not needed?
May 3, 2007:
I once read that Propecia works by means of gene transcription. What does this mean? Can Propecia alter a person's genes?
March 16, 2007:
I was looking at a Wikipedia article on Chromosome 1. I was perusing the list of genes on Chromosome 1 and ran across these:
GLC1A: gene for glaucoma
HPC1: gene for prostate cancer
Do these genes have no other purpose than to trigger illness?
March 9, 2006:
What is the story with this other kind of DNA--mitochondrial DNA? Only mothers pass it (is that true) and does it have traits or an effect on children? In what way? Oh, where is it?
November 7, 2005:
Since there is a finite number of base-sequences in our DNA and also a finite number of genes (combinations of those base sequences), isn't there a finite number of "possible" human beings? What is that number?
September 12, 2005:
I have some questions about X inactivation. How long after conception does X inactivation take place? Is it possible to artificially induce X inactivation? Might that be useful for males with Klinefelter's syndrome?
August 17, 2005:
I've heard that DNA of adults is different than DNA of an embryo. What's different, and when does the change occur?
April 28, 2005:
Hi I was wondering if you could tell me what is allelic frequency? And can you tell me which allele I have. If my grandmother on my mothers side has blue eyes, my grandfather has green eyes and she and her brother have green eyes too. My father's dad has blue eyes and his mother brown. He has brown eyes but some of his brothers and sisters have green eyes and one I think has blue. Me and my brother both have dark brown eyes. I am the eldest.