Category: Evolution in a nutshell
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Is male or female a weak sex?
by Marta Koblańska, July 26, 18:10, Photo: DNA, author TyliJura, Pixabay The relationship between the male sex code and the female body is unclear. However, a virtual degradation leads to a selective advantage, though this may be misleading, according to a study conducted by Austrian scientists. Sex determinants, namely the X and Y chromosomes, emerge…
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How and why does the hippocampus decline? Some facts
by Marta Koblańska, 16.07.2025, 16:30 Polish time Photo: Brain, Thanks to geralt, Pixabay Alzheimer’s disease, the most common neurodegenerative disorder globally, is often linked to atrophy of the hippocampus. However, a new study conducted by scientists at ShanghaiTech University has revealed that this decline may also be a result of the disease’s progression. Their findings…
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Rzeczywiste i iluzoryczne kontrowersje wokół ciąży
Zdjęcie: Zapłodnienie. Licencja TBIT, Pixabay Im cięższa jest wada genetyczna zarodka i późniejszego płodu, tym szybciej jest on eliminowany z organizmu kobiety. Lżejsze wady z reguły pozwalają na donoszenie ciąży, choć nie oznacza to, że dziecko przeżyje po urodzeniu – mówią eksperci z zakresu ginekologii i położnictwa oraz neonatologii. Organizm ludzki powstaje stopniowo, po połączeniu…
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Why are genes less similar better for studying diseases?
Photo: Baboon, Clker-Free-Vector-Images, Pixabay Baboons show greater resilience to diseases despite their diverse genome, whereas humans, with a singular set of chromosomes, exhibit increased susceptibility – according to a new study published in ,,Cell Genomics”. Genetic variations differ in humans as a whole body or within the body in certain tissues. Genetic variation, simplifying, is the number of chromosomal…
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When and why might the genetic code change? Groundbreaking research addresses these questions.
Photo: Evolved macroscopic “snowflake” yeast from the MuLTEE experiment. The large size of the nuclei (yellow) and cells (cyan) are results of whole-genome duplication and aneuploidy. Credit: Georgia Institute of Technology The specific chromosomal configurations and changes in their numbers may persist or disappear depending on population size and environmental conditions. Can we live outside…