MadSci Network: Genetics
Query:

Re: Nuclear DNA of pre-meiotic cells if use in cloning then?

Date: Fri May 3 15:19:23 2002
Posted By: Matthew Eveland, Undergraduate, molecular genetics,biology, pensacola junior college
Area of science: Genetics
ID: 1020142062.Ge
Message:

in a male they are called spermatagonia and are located in the testicles. 
some of these cells will divide mitotically to produce male germ cells 
while others will become what are called primary spermatocytes and undergo 
sprematogenesis ( the process of making sperm ). in females the eggs 
develope from oogonia. Both of these are present at birth so would be 
considered specialized cells. As to the telomere lenght i try to keep up 
with all of the research being done with telomeres but it is a lot and i 
have not read anything directly discussing telomere lenght in reproductive 
cells. however, these cells do have telomeres so i would assume that they 
to shorten with each mitotic division. most of the cells will be of 
different lenghts because different cells in the body divide at different 
rates. the egg of a woman for instance only divides mitotically once 
before it is shiped off in the hopes of becoming a little zygote. by the 
time that particular egg does that some of the other cells in your body 
could have divided thousands of times. a clone from the DNA of an egg or 
sperm would have a zero biological age especially if it has not started to 
develope into a zygote or anything.


as for the cats thanks for the link. i didnt think about that but yes, if 
the cat was a female the coat could be different, but only in females.


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