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Understanding Homology and Analogy
  • Home
    • What are Homologous Traits?
    • Understanding Homology and Analogy
    • Exploring Analogous Traits
    • What is a Phylogenetic Tree
Understanding Homology and Analogy
  • Home
    • What are Homologous Traits?
    • Understanding Homology and Analogy
    • Exploring Analogous Traits
    • What is a Phylogenetic Tree
  • More
    • Home
      • What are Homologous Traits?
      • Understanding Homology and Analogy
      • Exploring Analogous Traits
      • What is a Phylogenetic Tree

Understanding Homology and Analogy

Directions

As you explore more examples of homologous and analogous traits, begin to look at the slideshow below. This slideshow has a built in test to identify homologous bone structures. After, explore how these organisms are related to each other and then proceed to the next section.

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Inheriting Homologous Traits

Whales, lizards, humans, and birds all have the same basic limb layout. But how did such different animals wind up with the same sort of limb?

The answer is that they inherited it from a common ancestor, just as cousins might inherit the same trait from their grandfather.

This evolutionary tree shows the relationships between different tetrapod lineages, all of which evolved from a single common ancestor. This 350 million year old animal, the first tetrapod, had limbs with one long bone (the humerus) attached to two other long bones (the radius and ulna).

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