UNIT III Practice Exam_3 & KEY

UNIT III Practice Exam_3 & KEY - UNIT III EXAM FORM...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
UNIT III EXAM - FORM A BSC 2011 Fall 2007 NAME, PLEASE: _______________________ LAST 4 DIGITS of SS#: ________ MULTIPLE CHOICE: please select the letter of the choice that best answers or complete the following questions. 1. The allele that causes sickle-cell anemia is maintained in some populations because of _____. A. frequency-dependent selection B. stabilizing selection C. heterozygote advantage D. gene flow E. genetic drift 2. In nature, if snow geese with the “blue” morph only mated with other “blue” morphs, and never with any “white” morph, this would be an example of _____. A. inbreeding B. random mating C. natural selection D. assortative mating E. frequency-dependent mating 3. The forelimbs of modern vertebrates such as a human, a bird, and a bat provide a nice example of _____. A. the inheritance of acquired characteristics B. the idea that ontogeny recapitulates phylogeny C. convergent evolution D. vestigial organs E. descent with modification from a common ancestor 4. In a population of fish, the smallest fish are eaten by crayfish and the largest fish are eaten by wading birds. Medium fish are too big for to be eaten by crayfish and too small for the birds to detect and grab as prey. What kind of selection is operating in this fish population? A. positive directional selection B. negative directional selection C. stabilizing selection D. disruptive selection E. frequency-dependent selection 5. Which of the following scenarios would most likely cause a population to evolve via genetic drift? A. a spontaneous change in the chromosome number in a population B. movement of individuals back and forth between neighboring populations C. negative assortative mating D. the initiation of a new population by a small number of individuals E. when the rarest phenotype in a population has the highest fitness
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6. The allele frequency for fur color in a population of beach mice on Dauphin Island changed dramatically after Hurricane Katrina roared through that part of the Gulf coast and killed many of the beach mice. This is an example of ____. A. gene flow B. catastrophism C. a bottleneck event D. a founder effect E. frequency-dependent selection 7. Kettlewell’s experiment showing that light and dark-colored peppered moths had differential survival in sooty, urban environments compared to cleaner, rural environments was an important early experimental study that demonstrated _____. A. natural selection B. genetic drift C. melanism is a heritable trait D. early evidence of global warming E. frequency-dependent selection 8. Body size in a species of gray mice shows clinal variation from north to south with northern mice having a larger phenotype than southern mice. If the clinal variation is due to genetic rather than environmental causes, then if I move a pregnant female from Boston to Tallahassee and allow her to give birth and raise her offspring here, how would I expect her offspring to compare to native mice born and bred here in Tallahassee? A. The Boston offspring will have a similar body size to Tallahassee mice.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/01/2012 for the course BSC BSC2011 taught by Professor Spears during the Spring '10 term at FSU.

Page1 / 8

UNIT III Practice Exam_3 & KEY - UNIT III EXAM FORM...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online