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The dragon lizard Pogona vitticeps has ZZ/ZW micro-sex chromosomes

Overview of attention for article published in Chromosome Research, December 2005
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  • In the top 25% of all research outputs scored by Altmetric
  • Good Attention Score compared to outputs of the same age (79th percentile)

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4 tweeters
1 Wikipedia page


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133 Mendeley
The dragon lizard Pogona vitticeps has ZZ/ZW micro-sex chromosomes
Published in
Chromosome Research, December 2005
DOI 10.1007/s10577-005-1010-9
Pubmed ID

Tariq Ezaz, Alexander E. Quinn, Ikuo Miura, Stephen D. Sarre, Arthur Georges, Jennifer A. Marshall Graves


The bearded dragon, Pogona vitticeps (Agamidae: Reptilia) is an agamid lizard endemic to Australia. Like crocodilians and many turtles, temperature-dependent sex determination (TSD) is common in agamid lizards, although many species have genotypic sex determination (GSD). P. vitticeps is reported to have GSD, but no detectable sex chromosomes. Here we used molecular cytogenetic and differential banding techniques to reveal sex chromosomes in this species. Comparative genomic hybridization (CGH), GTG- and C-banding identified a highly heterochromatic microchromosome specific to females, demonstrating female heterogamety (ZZ/ZW) in this species. We isolated the P. vitticeps W chromosome by microdissection, re-amplified the DNA and used it to paint the W. No unpaired bivalents were detected in male synaptonemal complexes at meiotic pachytene, confirming male homogamety. We conclude that P. vitticeps has differentiated previously unidentifable W and Z micro-sex chromosomes, the first to be demonstrated in an agamid lizard. Our finding implies that heterochromatinization of the heterogametic chromosome occurred during sex chromosome differentiation in this species, as is the case in some lizards and many snakes, as well as in birds and mammals. Many GSD reptiles with cryptic sex chromosomes may also prove to have micro-sex chromosomes. Reptile microchromosomes, long dismissed as non-functional minutiae and often omitted from karyotypes, therefore deserve closer scrutiny with new and more sensitive techniques.

Twitter Demographics

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Mendeley readers

The data shown below were compiled from readership statistics for 133 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Portugal 2 2%
Brazil 1 <1%
Spain 1 <1%
France 1 <1%
Germany 1 <1%
Japan 1 <1%
Hungary 1 <1%
Czechia 1 <1%
Netherlands 1 <1%
Other 0 0%
Unknown 123 92%

Demographic breakdown

Readers by professional status Count As %
Researcher 34 26%
Student > Ph. D. Student 30 23%
Student > Master 20 15%
Student > Bachelor 13 10%
Other 8 6%
Other 28 21%
Readers by discipline Count As %
Agricultural and Biological Sciences 83 62%
Biochemistry, Genetics and Molecular Biology 18 14%
Environmental Science 12 9%
Unspecified 6 5%
Social Sciences 3 2%
Other 11 8%

Attention Score in Context

This research output has an Altmetric Attention Score of 6. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 30 July 2019.
All research outputs
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Outputs from Chromosome Research
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Outputs of similar age
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Outputs of similar age from Chromosome Research
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Altmetric has tracked 13,703,906 research outputs across all sources so far. Compared to these this one has done well and is in the 77th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 384 research outputs from this source. They receive a mean Attention Score of 3.8. This one has done well, scoring higher than 84% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 132,170 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 79% of its contemporaries.
We're also able to compare this research output to 3 others from the same source and published within six weeks on either side of this one. This one has scored higher than all of them