New research reveals the genes that likely allowed whales to grow to giant sizes compared to their ancestors, reports a study published today (January 19) in the journal Scientific Reports. The findings highlight the role of four genes (called GHSR, IGFBP7, NCAPG, and PLAG1), and suggest that they p
A study published in Scientific Reports has uncovered the genes that likely enabled whales to grow to enormous sizes compared to their ancestors. The research has identified four genes that appear to enhance large body size while also reducing the associated negative consequences such as increased cancer risk.
Whales, dolphins, and porpoises evolved from small, land-based ancestors around 50 million years ago, but some species are now among the largest animals to have lived. However, gigantism can bring biological disadvantages, such as lower reproductive output and increased chances of diseases such as cancer, and it has not been clear what role different genes have played in driving gigantism in whales.
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