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6 Cards in this Set
- Front
- Back
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What is an example of directional selection in the wild? |
Chain and Shephard's snails |
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Define sexual dimorphism |
The fact that in some species there are vast morphological differences between males and females |
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Give 3 examples of species showing sexual dimorphism |
Dung beetles, fur seals, elk |
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Give an examples of species showing male-male combat |
Iguanas (flick each other with tails), elk (battle with horns) |
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Give an examples of species showing competition at the level of sperm |
Drosophilia (inject so much sperm that it swamps out any other males') |
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Give some examples of flashy traits in males designed to show off their good genes or reduced parasite load. |
Peacock's tail, guppy's bright coloured body, jumping spider mating dance, Japanese puffer fish patterns on seafloor, bird's of paradise bright blue colouring, barn swallows long tails. |
