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Sex Chromosome

All articles tagged with #sex chromosome

science1 year ago

"Octopuses' Sex Chromosome Evolution: A 380-Million-Year Journey"

Researchers have discovered the oldest known animal sex chromosome, the octopus Z chromosome, which evolved around 380 million years ago in an ancient ancestor of octopuses. This finding sheds light on how sexual development is directed in cephalopods, including octopuses and squid, and suggests that genes are involved in sex determination in these creatures. The Z chromosome has been found in various octopus and squid species, indicating its evolutionary conservation, and it is considered one of the oldest sex chromosomes in both animals and plants.

via Nature.com|
#cephalopods#evolution#genetics
biology2 years ago

The Colorblindness of Male Butterflies: Exploring the Lack of Vivid Vision

Female zebra longwing butterflies have the ability to see colors that males cannot, thanks to a gene on their sex chromosome called UVRh1. Researchers have discovered this through genomic sequencing and lab experiments. The presence of this gene on the sex chromosome raises questions about how it got there and sheds light on the evolution of differences between sexes. Further research on other longwing species may provide more insights into the origins of this gene and other differences between male and female butterflies.

via The New York Times|
#biology#butterflies#color-vision
biology2 years ago

Unveiling the Colorful World of Butterflies: Biologists' Discovery

Biologists at the University of California, Irvine have discovered that sexually dimorphic vision in butterflies, where females perceive ultraviolet color while males see light and dark, is caused by a vision gene's jump onto a sex chromosome. This finding, observed in the Heliconius butterfly genus, is the first known instance of this genetic change causing sexually dimorphic vision. The study highlights the complexities of genetic sequencing and the importance of manual validation. The vision difference may explain why females and males of some butterfly species feed on different types of flowers.

via Phys.org|
#biology#butterfly#genetics