KamilSJaron
commented
3 weeks ago I quite like this definition
- it covers well haplodiploidy
- covers well homomorphic sex chromosomes
What I really like is that it removes the direct link with sex determination.
I guess only strange situation is created for PGE species (fungus gnats, gall midges and globular springtails) - the inheritance of what we call sex chromosomes and autosomes is the same; sex chromosomes are the chromosomes that are eliminated (paternal copy) in early development of males (while paternal autosomes are eliminated during spermatogenesis). So their "inheritance" does not correlate with sex, it's quite specifically just sex specific karyotype due to elimination patterns. I wonder if there is some easy fix I don't see.
But we could also just give up on having a definition that works for the words we used for flies and springtails; Maybe we should just stop calling them sex chromosomes (although there are tons and tons of papers doing that, especially in flies they exist since 20s);
ChiBenv
In which category is your new term request?
Preferred term label
Sex Chromosome
Synonyms
Allosome
Synonym type
None
Textual definition
Sex chromosomes are linkage groups whose inheritance is correlated with sex
ID of term
No response
Parent term
No response
Children term(s)
No response
Taxon-restricted
No response
Reference
Bachtrog, D., M. Kirkpatrick, J. E. Mank, S. F. McDaniel, J. C. Pires, W. Rice, and N. Valenzuela. 2011. Are all sex chromosomes created equal? Trends Genet. 27:350-357.
ORCID Identifier
0000-0003-1148-631X
Additional context
Definitions in OLS are so broad (i.e. "A chromosome involved in sex determination") that all ESD taxa would have sex chromosomes as chromosomes carrying genes in ESD that sense or transduce the environmental signal during sex determination (to commit the bipotential gonad/individual to its sexual fate) could be consider sex chromosomes by this definition.
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