BiologyOct15th2006 - 3. To be considered biologically fit,...

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Dustin Lee 10/15/2006 Biology Block C 1. A gene pool consists of all the alleles (alternative forms of genes) in all the individuals that make up a population 2. Genetic drift has affected the cheetahs by one or more bottleneck events. Like many African mammals, a sharp decrease in the cheetah population occurred during the last ice age about 10,000 years ago. In the nineteenth century, farmers hunted the animals to near extinction. Today only a few small populations of cheetahs exist in the wild. There is some evidence from genetic studies that variation is relatively low among cheetah compared to other mammals.
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Unformatted text preview: 3. To be considered biologically fit, production of healthy fertile offspring is needed. 4. One of the Grants research projects focuses on beak size in the medium ground finch. This finch uses its strong beak to crush seeds. Given a choice of small or large seeds, the birds eat mostly smaller ones, which are easier to crush. Large seeds from one plant species are common on the island, but these large seeds are particularly difficult to crack. 5. To main forces of changes in a gene pool are genetic drift and mutation....
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This note was uploaded on 09/21/2011 for the course BIOG 1110 taught by Professor Randywayne during the Spring '09 term at Cornell University (Engineering School).

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