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3 results for “polyspermy”
Data from: Polyspermy in birds: sperm numbers and embryo survival
Polyspermy is a major puzzle in reproductive biology. In some taxa, multiple sperm enter the ovum as part of the normal fertilisation process, while in others, penetration of the ovum by more than one sperm is lethal. In birds, several sperm typically enter the germinal disc, yet only one fuses with the female pronucleus. It is unclear whether supernumerary sperm play an essential role in the avian fertilisation process and, if they do, how females regulate the progression of sperm through the oviduct to ensure an appropriate number reach the ovum. Here we show that when very few sperm penetrate the avian ovum, embryos are unlikely to survive beyond the earliest stages of development. We also show that when the number of inseminated sperm is limited, a greater proportion than expected progresses to the site of fertilisation, indicating that females compensate for low sperm numbers in the oviduct. Our results confirm an essential role for supernumerary sperm in the processes of fertilisation and early embryogenesis, providing an exciting expansion of our understanding of sperm function in birds.
Data from: Polyspermy in birds: sperm numbers and embryo survival
Open the record for dataset details and reuse information.
Selective egg cell polyspermy bypasses the triploid block
GEO Series GSE130186. Arabidopsis thaliana. 60 samples. Type: Expression profiling by high throughput sequencing.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.