crepsis Posted April 30, 2008 Share Posted April 30, 2008 Some insects such as cockroaches, grasshoppers, and crickets have only one type of sex chromosome: X. This means that male and female cockroaches have a different number of chromosomes. This is very different from most organisms, which have either X and Y sex chromosomes (most people are familiar with these) or W and Z sex chromosomes (birds and some insects use these for sex determination). Females have two of the same sex chromosomes (XX) Males have just one sex chromosome (X0) <---The 'zero' is a place marker, it means that there is no second X chromosome there. Quote Link to comment Share on other sites More sharing options...
Maarten.. Posted April 30, 2008 Share Posted April 30, 2008 Interesting indeed, do you have more lecture on the subject? Quote Link to comment Share on other sites More sharing options...
crepsis Posted May 1, 2008 Author Share Posted May 1, 2008 Unfortunately no, I've just been doing some research on the internet and found this piece of information interesting. I thought that it would be interesting for other people as well, since I had no idea that it was even possible for different sexes of the same species to have a different number of chromosomes! I found it in the abstract of a research paper on cockroach chromosomes, and I'm too cheap to pay for the whole article to read more, at this point, when I can probably find more related information for free with a little work. But, if I do run across anything else like this, I will definitely share it! Quote Link to comment Share on other sites More sharing options...
BugmanPrice Posted May 1, 2008 Share Posted May 1, 2008 If you could get a link chances are I could get it for free for you. What's really cool is in some hermaphroditic species a XO is male and XX is a hermaphrodite. cool stuff. Unfortunately no, I've just been doing some research on the internet and found this piece of information interesting. I thought that it would be interesting for other people as well, since I had no idea that it was even possible for different sexes of the same species to have a different number of chromosomes! I found it in the abstract of a research paper on cockroach chromosomes, and I'm too cheap to pay for the whole article to read more, at this point, when I can probably find more related information for free with a little work. But, if I do run across anything else like this, I will definitely share it! Quote Link to comment Share on other sites More sharing options...
crepsis Posted May 2, 2008 Author Share Posted May 2, 2008 If you could get a link chances are I could get it for free for you. What's really cool is in some hermaphroditic species a XO is male and XX is a hermaphrodite. cool stuff. Very cool stuff! Apparently, that was not in an abstract...I just assumed it was, because I had been reading so many that day, and the article was so short I guess it just all ran together in my head when I thought to post it here. It's actually an answer to a reader's question in 'India's National Newspaper' - The Hindu, by an Entomologist at AVRDC, The World Vegetable Center, Dr. R. Srinivasan, in Shanhua, Taiwan. Quote Link to comment Share on other sites More sharing options...
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