5CPractice_Final

5CPractice_Final - Practice problems for Final exam for Bio...

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Practice problems for Final exam for Bio 5C Spring 2010 The last 1/3 of the course on Evolution. Please remember that additional material can be tested from the lectures, please use this as a guide to remind yourself of all the terms and definitions we went through as well as the problems. The book is a suitable reference for the concepts the lectures were on, but not all the material from the book will be tested on so use the lectures and concept summary as your guide. Remember the test will also include 25 problems from the 1st and 2nd midterm. Most of these have not been included in the practice questions so go back over that material to make sure you understand how to use the equations from Dr Walton's lectures and the basic genetics and terminology from the first part of the evolution section. You should know the Hardy-Weinberg equation so don't expect it to be part of the equations provided! 1. The half-life of Carbon-14 decaying to Nitrogen-14 is 5,730 billion years. A mammoth bone fossil found in Siberia appears to be 22,920 years old. If these fossils now contain 6 grams of C-14, how much C-14 did they contain when this mammoth died? 2. A disease is controlled by a single gene with two alleles. Assume Hardy-Weinberg equilibrium for this gene. If one in 2,000 monkeys have albinism, what is the ratio of heterozygous carriers to those with the disease? 3. If a trait varies continuously then it's inheritance is most likely an example of __________ ? 4. Jenny's sister has PKU, a recessive disorder. Neither of her parents have the disorder. What is the chance that Jenny is a carrier of the PKU allele? 5. What is the chance that Jenny (from the previous question!) and her husband Steve who doesn't have the disease will have a child with PKU if the disorder is seen in 1/ 15,000 births? 6. Alice's brother Leo has hemophilia, a sex-linked disease. Their father Albert did not have the disease. What are the chances she will have a child with the disease if her husband doesn't have disease either. 7. A clade that is valid because it contains the ancestor and ALL the descendants is called ? 8. A clade that is invalid because it DOES NOT contain all of the descendants of the ancestor? 9. A clade that is invalid because it contains a grouping of species which do not all descend from a common ancestor?
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10. All Chordates have a spinal cord and no other organisms have this trait, this is an example of? 11. When a new colonized by lizards a few million years ago. When it is studied today we find that there are very diverse species of lizards. Some living on the side of the island with dark rocks are primarily dark colored. Lizards the living in the jungle are of different colors, and those living in the sand dunes tend to be white in color. What among these are likely evolutionary scenarios that occurred? (more than one may apply)
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5CPractice_Final - Practice problems for Final exam for Bio...

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