Male stalk-eyed flies with short eyestalks are less attractive to females but fight more fiercely, scientists discover - Phys.org

In stalk-eyed flies, longer eyestalks attract the ladies. Females prefer males with longer eyestalks, and other males are less likely to fight them for access to females. But some males have a copy of the X chromosome which always causes short eyestalks.Ads Links by Easy Branches
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