BIOL 1001 Introduction to Biology Exam ­ Week 4

BIOL 1001 Introduction to Biology Exam ­ Week 4 1. In land mammals, the pelvic girdle serves to connect the legs to the rest of the skeleton. Whales have a small residual pelvic girdle that does not attach to anything. This is an example of _. 2. A heterozygous organism: 3. Evidence for evolution includes: 4. You discover a primate fossil while on an expedition in Africa. Which part of the skeleton would you be most interested in examining in order to classify this primate as a human or a nonhuman primate? 5. Because of the law of independent assortment: 6. What is the role of fossils in supporting the theory of common descent? 7. Which of the following statements is false? 8. Dihybrid crosses involve........trait(s). 9. Cystic fibrosis is caused by the allele f, which is completely recessive to the normal dominant allele F. Consider a couple with the genotype Ff. What is the chance that their first child will develop cystic fibrosis? 10. In humans, heterozygotes are referred to as , particularly when the recessive allele is associated with a genetic disease. 11. How could two parents with curly hair (a dominant condition) have boys and girls with straight hair (a recessive condition)? 12. How many genetically different types of sperm could an animal that is heterozygous­dominant for one trait produce? 13. A mutation in a gene: 14. Assuming that the genes are on separate chromosomes, an organism with the genotype AaBb will make gametes in the following proportions: 1/4 AB, 1/4 Ab, 1/4 aB, and 1/4 ab. This is an example of: 15. Phenotypic features that are coded for by several genes, such as eye color in humans, are called: 16. Match each model of life on earth in column 1 with its description in column 2. 17. DNA is often likened to an instruction manual. According to this analogy, the typographical errors that would inevitably result when the DNA “manual” is transcribed would be similar to: 18. Bat wings are homologous to the front legs of cats. What does the term homologous mean in this context? 19. Which of the following groupings are in order from broadest to narrowest? 20. If a blue­colored flower crossed with a white­colored flower produced light blue­colored flower offspring, then it’s most likely a case of: