2007-01-28 16:57:30 · 4 answers · asked by Alex 2 in Science & Mathematics ➔ Biology
http://en.wikipedia.org/wiki/Achondroplasia
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Abstract&list_uids=17142012
http://aje.oxfordjournals.org/cgi/content/abstract/161/9/816
http://ageofthefatherandhealthoffuture.blogspot.com/
http://www.medicalnewstoday.com/medicalnews.php?newsid=48848
2007-01-28 17:21:11 · update #1
http://list.web.net/archives/mnchp-l/2004-April/000508.html
35 is the cut-off age for donor sperm at the following cryobank http://www.nwcryobank.com/donor_standards.html
2007-01-28 17:41:03 · update #2
http://en.wikipedia.org/wiki/Paternal_age
The question is why this happens?
2007-01-28 17:57:09 · update #3
I always thought that the age limit worked for both men and women. The reason for that is that with advanced age it is more likely for the process called meiosis not to be very precise. Meiosis is the mechanism by which germ cells (oocytes and sperms) are formed. These germ cells are haploid and derive from disjunction of sister chromatids at Meiosis I or meiosis II. When the separation is not normal, it is called nondisjunction. This results in the production of gametes (germ cells) which have either more or less of the usual amount of genetic material, and is a common mechanism for trisomy or monosomy. Nondisjunction can occur in the meiosis I or meiosis II phases of cellular reproduction and the incidence of it increases with the age of the "parents". This is a cause of several medical conditions in humans including trisomias and sexual disfunctions (Turner syndrome and Klinefelter Syndrome).
2007-01-28 17:56:31 · answer #1 · answered by Jesus is my Savior 7 · 0⤊ 0⤋
Nor have I. Women are born with all of their eggs at birth. Men are producing new sperm all of the time. Maybe as men get older their sperm production process starts to go on the blink. However I know that when women get older the eggs start to get a little rotten. but I have never heard the man thing. I had all my kids when I was over 35. At least now I know why they are driving me stark raving mad. ha ha ha
2007-01-29 01:15:16 · answer #2 · answered by trichbopper 4 · 0⤊ 0⤋
Ummm, I would'nt take any of these answers to "THE BANK", the statment that you made IS NOT TRUE !
2007-01-29 05:27:25 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Well that is a new one to me i never heard of that.
2007-01-29 01:07:28 · answer #4 · answered by CHAEI 6 · 0⤊ 0⤋