front 1 What is the most plausible explanation for why the male of most birds species have elaborate plumage and mating rituals? A. sexual selection | back 1 A |
front 2 The recessive allele for sickle cell anemia is more prevalent in regions of Africa where malaria is prevalent, than it is in regions where there is no malaria.This is due to a A. frequency dependent selection | back 2 D |
front 3 Which of the following reflect(s) the likely of (a) gene mutation(s)? A. fruit flies subjected to intense produce a wider array of
variable offspring. | back 3 D |
front 4 A population of organisms that reproduce asexually without gametes from other individuals will display more variation than a population that reproduces sexually. This results in a greater likelihood of the population evolving. | back 4 FALSE |
front 5 Which of the following is required for natural selection to occur in a population? A. variation in the population | back 5 E |
front 6 The northern elephant seal was hunted almost to extinction during the 18th and 19th centuries. Less than 100 seals were left to contribute to the gene pool of their future generations. Since the early 20th century, the elephants seals have been protect by law in both the U.S. and Mexico. Over 100,000 seals now inhabit the western shores of North America, all related to the small population that survived the slaughter of hunters. Scientists fear the elephant seals may be more susceptible to disease and pollution due to a _____________ A. Founder Effect | back 6 B |
front 7 If two adjacent populations of the same species show gene flow, then the two populations will A. become isolated from each other | back 7 B |
front 8 A certain species of butterfly varies in color from white to dark blue. The birds found in the same area feed on the white or lightly colored butterflies, leaving butterflies that are darkly colored. This may result in what type of selection? A. directional selection | back 8 A |
front 9 An allele becomes the most common allele in a population by becoming the dominant allele. | back 9 FALSE |
front 10 The bottleneck effect is thought to be responsible for the loss of genetic variability in a species | back 10 TRUE |
front 11 The most common source of genetic variation in sexually reproducing organisms is A. duplication of chromosomes | back 11 C |
front 12 In a population, the allele frequency for red flower color remained
at 0.7 and the allele frequency for white flower remained at 0.3 for
six generations. This _____ an example of a Hardy-Weinberg equilibrium
in that __________ | back 12 A |
front 13 Which of the following would change the allele frequencies of a population? A. DNA is stable from generation to generation and does not change,
so allele frequencies do not change. | back 13 B |
front 14 While studying gull egg laying abilities a researcher noted that the
birds laid an average of 7-9 eggs per clutch at the beginning of the
study. After studying the population for 15 generations the researcher
noted that the birds now laid an average of 3-4 eggs per clutch. What
type of natural selection is occurring in the population of gulls? | back 14 A |
front 15 Our domesticated honey bee-originally from Europe- is slow to sting,
requires abundant flower nectar, gets up late in the morning, &
store much honey but only produces enough new brood to swarm once a
year. Because the European honey bee was performing poorly as a honey
producer in South America, the African subspecies was imported in a
breeding experiment. The African honey bee formed small nests, foraged
earlier & on smaller nectar sources, produced less honey stores
& more brood, swarmed four or five times a year, & was fast to
sting. However, when the African queens escaped, the two populations
interbred & the African genotype spread several hundred miles
north each year. Surprisingly, a hundred miles behind the expanding
range of the African honey bees, the European and hybrid stains died
out and the bees were essentially 100 percent African. How would this
be explained in evolutionary genetics terms? | back 15 A |
front 16 If the Hardy-Weinberg equilibrium is met, what is the net effect? A. very slow and continuous evolution with no increased
adaptation | back 16 C |
front 17 What is the term used to describe the changes in allele frequencies
of a population over generations? | back 17 B |