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Ploidy

ploidy

The number of sets of chromosomes within a cell or organism. Each set is designated n so one set is n is haploid, two sets is 2n is diploid, three sets is 3n is triploid, four sets is 4n is tetraploid, etc. Also, unspecified multiple sets (but more than two) is polyploidy, and extremely large number of sets may be designated by number (for example 15-ploid for fifteen sets). The number of chromosome sets that make up the [[genome of an organism, e.g. [[polyploidy.


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Can you use mtDNA to...

... know. You may need more nuclear information to be able to identify individual fathers. I know that many amphibians are polyploid. Do you know the ploidy level of your species? Are these egg masses from one pond/lake, drainage sytem, state? What is important is if you need to discriminate between ...

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by wbla3335
Wed Apr 29, 2009 12:54 pm
 
Forum: Genetics
Topic: Can you use mtDNA to...
Replies: 12
Views: 1484

Karyotyping of Plants

Unless you know the sequence or some other additional information, it's not useful. For example, some postulate that humans evolved by some ploidy mutation from the ape/chimp/human common ancestor. But you can't confirm that using just ploidy.

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by mith
Mon Feb 09, 2009 10:54 pm
 
Forum: Genetics
Topic: Karyotyping of Plants
Replies: 2
Views: 488

Karyotyping of Plants

The number of chromosomes and their ploidy are somewhat arbitrary and you will probably find it difficult to infer anything from comparing karyotypes. For example cats have 38 chromosomes, Humans 46, Dogs 78, and they are all mammals, trying ...

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by domwood
Mon Feb 09, 2009 7:31 pm
 
Forum: Genetics
Topic: Karyotyping of Plants
Replies: 2
Views: 488

Re: Ploidy Number

For some reason "calculating" the diploid and haploid number of an organism/cell is messing me up. If I have a cell with four pairs of homologous chromosomes, the diploid number should be four, right? Also, if there is an organism with a haploid number of X then what would the number for ...

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by Cat
Fri Mar 07, 2008 6:22 pm
 
Forum: Cell Biology
Topic: Ploidy Number
Replies: 3
Views: 1282

Ploidy Number

For some reason "calculating" the diploid and haploid number of an organism/cell is messing me up. If I have a cell with four pairs of homologous chromosomes, the diploid number should be four, right? Also, if there is an organism with a haploid number of X then what would the number for a...

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by Tokophyra125
Mon Mar 03, 2008 2:43 am
 
Forum: Cell Biology
Topic: Ploidy Number
Replies: 3
Views: 1282
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