Lecture20bio

Lecture20bio - BIOLOGY 1001 Wednesday, April 2, 2008...

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Wednesday, April 2, 2008 Lecture 20 Homologous Structures have similar anatomy. Figure 14-7 Vestigial Structures Figure 14-8 Comparative Embryology Figure 14-10 Similar Vertebrate Embryos Vertebrates have similar genes controlling early development. Later in development, different genes turn on or off. (((SHE SHOWS PICTURES OF A FISH, CHICKEN, MOUSE, AND HUMAN))) All organisms use: DNA = Universal Genetic Material Roughly the same 20 amino acids to make proteins. ATP = Primary form of cellular energy RNA and ribosomes to make protein. DNA Sequences Reflect Evolutionary Relationships ((SHE SHOWS A TREE WITH TIME AS THE GUIDELINES AND LISTS THINGS LIKES MONKEYS< CHIMPANZEES, AND HUMANS.)) Clicker Question: Which of the following structures is NOT homologous to the others? Answer: Insect Wing Artificial Selection Humans are the selection agent. Humans choose individuals with desirable traits for breeding.
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This note was uploaded on 06/09/2010 for the course BIOL 1001 taught by Professor Minor during the Spring '08 term at LSU.

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Lecture20bio - BIOLOGY 1001 Wednesday, April 2, 2008...

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