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[21] [22] If the result of such a failure is favoured by natural selection, genetic assimilation occurs. In the 1960s, Waddington and his colleague the animal geneticist J. M. Rendel argued for the importance of genetic assimilation in natural adaptation, as a means of providing new and potentially beneficial variation to populations under ...
Through this process of genetic assimilation, an environmentally induced phenotype had become inherited. Waddington explained this as the formation of a new canal in the epigenetic landscape. It is, however, possible to explain genetic assimilation using only quantitative genetics and a threshold model, with no reference to the concept of ...
[1] [2] The paper proposed a mechanism for specific selection for general learning ability. As the historian of science Robert Richards explains: [ 3 ] If animals entered a new environment—or their old environment rapidly changed—those that could flexibly respond by learning new behaviours or by ontogenetically adapting would be naturally ...
One study demonstrated that cross-modal visual and auditory integration is present from within 1 year of life. [101] This study measured response time for orientating towards a source. Infants who were 8–10 months old showed significantly decreased response times when the source was presented through both visual and auditory information ...
The zoo celebrated the occasion with the sweetest video on TikTok. And now people online are chomping at the bit to see these two in real life. The two lions are babies.
The video starts with mom introducing the baby's scent to her fur babies by letting them smell a tiny cap that the baby wore. They were excited, as their tail wags show. Watch on to see how the ...
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In developmental biology, animal embryonic development, also known as animal embryogenesis, is the developmental stage of an animal embryo. Embryonic development starts with the fertilization of an egg cell (ovum) by a sperm cell (spermatozoon). [1] Once fertilized, the ovum becomes a single diploid cell known as a zygote.