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World Community Grid Forums
Category: Active Research
Forum: Mapping Cancer Markers Forum
Thread: Why there are 24 crhomosomes? |
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Thread Status: Active Total posts in this thread: 4
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cchilaquil
Cruncher Joined: Apr 5, 2007 Post Count: 5 Status: Offline Project Badges: 
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A really simple question, but really it has been nagging me. In the screensaver for Mapping Cancer Markers, the illustration has 24 chromosome pairs. Why, if the humans have 23 pairs? Perhaps the extra one is derived from evaluating both XY and XX pairs?
Thanks on your attention. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Is it the female one that differs from the male to represent there are then 24?
----------------------------------------edit: The wonders of the internet and search engines... in 5 seconds The human genome is the genome of Homo sapiens. It is made up of 23 chromosome pairs with a total of about 3 billion DNA base pairs. There are 24 distinct human chromosomes: 22 autosomal chromosomes, plus the sex-determining X and Y chromosomes. Chromosomes 1-22 are numbered roughly in order of decreasing size. [Edit 2 times, last edit by Former Member at May 3, 2020 11:39:41 AM] |
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yoerik
Senior Cruncher Canada Joined: Mar 24, 2020 Post Count: 413 Status: Offline Project Badges: 
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"Humans have 22 chromosome pairs and two sex chromosomes"
----------------------------------------You personally, if you are healthy - have 23.  |
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ErikaT
Former World Community Grid Admin USA Joined: Apr 27, 2009 Post Count: 912 Status: Offline Project Badges: 
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Perhaps the extra one is derived from evaluating both XY and XX pairs? You are correct. 24 pairs are shown to represent both the possible XY and XX combinations.Thank you for your support, ErikaT |
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