Karyotypes

More polar ocean turbulence due to planetary warming

New research suggests that ocean turbulence and horizontal stirring will dramatically increase in the Arctic and Southern Oceans due to human-induced Global Warming. The study uses ultra-high-resolution simulations to investigate how mesoscale horizontal stirring (MHS) responds to warming, revealing a pronounced future intensification ...

SourceInstitute for Basic Science·JournalNature Climate Change·TypeComputational simulation/modeling·DateNov 5, 2025

Sky & Telescope Pocket Sky Atlas, 2nd Edition

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Unraveling variations in ‘centromeres’: The engines of chromosomal segregation

Researchers analyzed centromeres in onion, garlic, and Welsh onion using CENH3-targeted antibody to map centromere regions. They found significant variations in size and position/mobility between species, challenging the static view of centromeres.

SourceOkayama University·JournalThe Plant Cell·TypeExperimental study·DateAug 7, 2025

Certain abnormal prenatal testing results and subsequent diagnosis of maternal cancer

A study found a correlation between abnormal noninvasive prenatal testing (NIPT) results and subsequent maternal cancer diagnoses. Occult malignancies may explain discordant NIPT results, highlighting the need for diagnostic procedures to determine fetal karyotypes.

SourceJAMA Network·JournalJAMA·DateJul 13, 2015

What is a species? It could be difficult to reply if you work with aphids

Recent study published in Comparative Cytogenetics reveals that green peach aphids (Myzus persicae) can have unusual karyotypes due to chromosomal fragmentations and rearrangements. This challenges the conventional view of species stability, as observed karyotype variations often result in reduced fertility or sterility.

SourcePensoft Publishers·JournalComparative Cytogenetics·DateNov 3, 2014

Advance in chromosomal evolution in sea cradles

Researchers analyzed chromosome changes in sea cradles, revealing a karyotype of 2n=24 chromosomes with biarmed elements. The study proposes that fusion among uniarmed elements drove this change in the Acanthochitonina suborder.

SourcePensoft Publishers·JournalComparative Cytogenetics·DateDec 12, 2012

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Are cancers newly evolved species?

Cancer researcher Peter Duesberg suggests that cancer is a form of speciation, where tumors are new species that operate independently and can grow without host control. This theory could lead to new insights into cancer growth and metastasis, as well as new approaches to therapy.

SourceUniversity of California - Berkeley·JournalCell Cycle·DateJul 26, 2011