Upgrade to remove ads
Hon Bio Final
Terms in this set (146)
Which of the following statements regarding the function of mitosis is false?
Mitosis allows organisms to generate diversity
Independent orientation of chromosome at Metaphase I of meiosis results in an increase in the number of
possible combinations of characteristics
During which stage of meiosis does synapsis and formation of tetrads occur
Which of the following is a feature of plant cell division that distinguished it from animal cell division
formation of a cell plate
The genetic material is duplicated during
the S phase
Nondisjunction occurs when
Members of a chromosomes pair fail to separate
Which of the following statements regarding the differences between mitosis is false?
Crossing over is a phenomenon that creates genetic diversity during mitosis
The creation of offspring carrying genetic information from a single parent is called
A benign tumor differs from a malignant tumor in that a benign tumor
does not metastasize
Cancer is not usually inherited because
the chromosomal changes in cancer are usually confined to somatic cells
If a chromosome fragment breaks off and then reattaches to the original chromosome, but in the reverse direction, the resulting chromosomal abnormality is called a(n)
Eukaryotic cells spend most of their cell cycle in which phase?
Which of the following must occur for a plant or animal to grow and develop normally?
The organism must be able to control the timing and rate of cell division in different parts of its body.
The phase of mitosis during which the nuclear envelope fragments and the nucleoli disappear is called
At the start of mitotic anaphase,
the centromeres of each chromosome come apart.
Which of the following statements is false
Gametes are made by mitosis
Both mitosis and meiosis are preceded by
The process by which the cytoplasm of a eukaryotic cell divides to produce two cells is called
.Which of the following statements regarding cell division is false?
Cell division is common in eukaryotes but rare in prokaryotes.
Which of the following options correctly describes the behavior of a tetrad during anaphase I of meiosis?
It splits into two pairs of sister chromatids, and one pair goes to each pole of the dividing cell.
Which of the following statements regarding mitosis and meiosis is false?
all sexual life cycles involve an alternation of diploid and haploid stages
What is a locus?
the precise location of a gene on a chromosome
a diploid zygote
Which of the following is false regarding sister chromatids?
both sister chromatids end up in the same daughter cell
The complex of DNA and protein that make up a eukaryotic chromosome in properly called
DNA replication occurs in
The s phase of interphase in both somatic and reproductive cells
If a somatic human cell is just about to divide, it has ____ chromatids.
Which of the following does NOT occur during mitosis?
Replication of chromosomes
Which event or events occur during anaphase?
all of the above occur during anaphase
The egg (ovum) of chinchilla contains 32 chromosomes. How many chromosomes are in the somatic cells of a chinchilla?
Regions of chromosomes where non sister chromatids cross over are called__
Mendel conducted his most memorable experiments on
Varieties of plants in which self-fertilization produces offspring that are identical to the parents are referred to as
A monohybrid cross is
a breeding experiment in which the parental varieties differ in only one character
Which of the following statements regarding genotypes and phenotypes is false?
An allele that is fully expressed is referred to as recessive
Research since Mendel's time has established that the law of segregation of genes during gamete formation
Applied to all sexually reproducing organisms
All the offspring of a cross between a black-eyed Mendelian and an orange- eyed Mendelian have black eyes. What is the expected phenotypic ratio of a cross between two orange-eyed mendeliens?
0 black eyed : 1 orange eyed
The phenotypic ratio resulting from a dihybrid cross showing independent assortment is expected to be
Mendel's law of independent assortment states that
each pair of alleles segregated independently of the other pairs of alleles during gamete formation
A testcross is
a mating between an individual of unknown genotype and an individual homozygous recessive for the trait of interest
Assuming that the probability of having a female child is 50% and the probability of having a male child is also 50%, what is the probability that a couple's first-born child will be female and that their second-born child will be male?
Dr Smith's parents have normal hearing. However, Dr Smith has an inherited form of deafness. Deafness is a recessive trait that is associated with the abnormal allele d. The normal allele at this locus, associated with normal hearing is D. Dr Smith's parents could have which of the following genotypes?
Dd and Dd
Amniocentesis and chorionic villus sampling allow for ______ and ______ of the fetus so that it can be tested for abnormalities.
Which of the following statements regarding genetic testing is false?
Most human genetic diseases are treatable if caught early
The expression of both alleles for a trait in a heterozygous individual illustrates
Which of the following statements regarding sickle-cell disease if false?
Sickle-cell disease causes white blood cells to be sickle-shaped
Which of the following refers to a situation where a single phenotypic character is determined by the additive effects of 2 or more genes?
The individual features of all organisms are the result of
genetics and the environment
Genes located on the same chromosomes are referred to as _____ genes and generally _____.
linked......do not sort independently during meiosis
A person with AB blood illustrates the principle of
Which of the following is an example of incomplete dominance in humans ?
All the offspring of a cross between a red-flowered plant and a white-flowered plant have pink flowers. This means that the allele for red flowers is _______ to the allele for white flowers.
For the most sexually reproducing organisms, Mendel's laws
cannot strictly account for most patterns of inheritance
Which of the following statements regarding prestabas testing is false?
Chorionic villus sampling is typically performed later in the pregnancy than amniocentesis
Which of the following statements best explains why dominant alleles that cause lethal disorders are less common than recessive alleles that cause lethal disorders?
Most individuals carrying a lethal dominant allele have the disorder and die before they reproduce, whereas individuals carrying a lethal recessive allele are more likely to be healthy and reproduce.
Most genetic disorders of humans are caused by
If A is dominant to a and B is dominant to b, what is the expected phenotypic ratio of the cross: AaBb x AaBb?
The alleles of a gene are found at ______ chromosomes.
the same locus on homologous
All the offspring of a cross between a black-eyed mendelien and an orange-eyed mendelien have black eyes. This mean that the allele for black eyes is ______ the allele for orange eyes.
Which of the following statements regarding cross-breeding and hybridization is false?
the hybrid offspring of a cross are the P1 generation
How does the foraging of animals on three seeds affect the distribution and abundance of the trees? This question...
A,B,C and D
Which of the following levels of organization is arranged in the correct sequence from most to least inclusive?
ecosystem, community, population, individual
Ecology as a discipline directly deals with all of the following levels of biological organization except
Which of the following statements best describes the difference in approach to studying the environment by early naturalists compared to present-day ecologists?
Early naturalists employed a descriptive approach; present-day ecologists generate hypotheses, design experiments and draw conclusions from their observations
of the following examples of ecological effect leading to an evolutionary effect (->) most correct?
A few individuals with denser fur survive the coldest days of an ice age -->the reproducing survivors all have long fur
Landscape ecology is best described as the study of
The factors controlling the exchange of energy, materials and organisms among ecosystem patches
Which of the following are important biotic factors that can affect the structure a organization of biological communities
Which of the following abiotic factors has the greatest influence on the metabolic rates of plants and animals?
Coral reefs can be found on the southern east coast of the United States but not at similar latitudes on the southern west coast. Differences in which of the following most likely account for this?
Deserts typically occur in a band at 30 degrees north and south latitude because
descending air masses tend to be cool and dry
Which of the following causes Earth's seasons?
the tilt of Earth's axis
As climate changes because of global warming, species' ranges in northern hemisphere may move northward. The trees that are most likely to avoid extinction in such an environment are those that
have seeds that are easily dispersed by wind or animals
How would an ecologist likely explain the expansion of the cattle egret?
A habitat left unoccupied by native herons and egrets met the biotic and abiotic requirements of the cattle egret transplants and their descendants
The main reason polar regions are cooler than the equator is because
sunlight strikes the poles at a lower angle
Species introduced to new geographic locations
can out-compete and displace native species for biotic and abiotic
Generalized global air circulation and precipitation patterns are caused by
rising, warm, moist air masses cool and release precipitation as they rise and then at high altitude, cool and sink back to the surface as dry air masses after moving north or south of the tropics
Which marine zone would have the lowest rates of primary productivity (photosynthesis)?
Where would ecologist find the most phytoplankton in a lake?
You are planning a dive in a lake, and are eager to observe not many underwater organisms but be able to observe them both close up and far away. You would do well to choose
an oligotrophic lake
Which of the following statements about the ocean pelagic biome is true?
Pelagic ocean photosynthesis activity is disproportionately low in relation to the size of the biome
are a diverse group of cnidarians often forming mutualistic symbiotic relationships with dinoflagellate algae
Which of the following is not true about estuaries?
Estuaries usually contain no or few producers
Probably the most important factors affecting the distribution of biomes is
An area in which different terrestrial biomes grade into each other is known as an
In which of the following terrestrial biome pairs are both dependent upon periodic burning?
chaparral and savanna
Which biome is able to support many large animals despite receiving moderate amounts of rainfall?
Which type of biome would most likely occur in a climate with mild, rainy winters and hot, dry summers?
The growing season would generally be shortest in which of the following biomes?
Trees are not usually found in the tundra biome because of
Which definition of evolution would have been most foreign to Charles Darwin during his lifetime?
change in gene frequency in gene pools
If, on average, 46% of the loci in a species' gene pool are heterozygous, than the average homozygosity of the species should be
Which of these is the smallest unit upon which natural selection directly acts?
An individual's phenotype
Which of these evolutionary agents is most consistent at causing populations to become better suited to their environments over the course of generations?
Each of the following has a better chance of influencing gene frequencies is small populations than in large populations, but which one most consistently requires a small populations as a precondition for its occurrence?
A trend towards the decrease in the size of plants on the slope of mountains as altitudes increase is an example of
which statement about variation is true?
all new alleles are the result of nucleotide variability
Which of these represents the treatment option that is most likely to avoid the production of drug-resistant HIV?
Using moderate doses of NA and of two different PI's at the same time for several months
Which is a true statement concerning genetic variation?
It arises in the response to changes in the environment
Darwin found that some of the species on the Galápagos Islands resembled species of the South American mainland
more than they resembled animals on ecologically similar but distant islands
Lyell's book Principles of Geology, which Darwin read on board the H.M.S. Beagle, argued in favor of which of the following concepts?
Earth's surface is shaped by natural forces that act gradually and are still acting
Who developed a theory of evolution almost identical to Darwin's?
Broccoli, cabbages, and Brussels sprouts all descend from the same wild mustard and can still interbreed. These varieties were produced by
Which of the following best expresses the concept of natural selection?
differential reproductive success based on inherited characteristics
Which of the following assumptions or observations contradicts Darwin's idea of natural selection?
Whether an organism survives and reproduces if almost entirely a matter of random chance
Aristotle believed that
species are fixed (permanent) and perfect
A dog breeder wishes to develop a breed that does not bark. She starts with a diverse mixture of dogs. Generation after generation, she allows only the quietest dogs to breed. After 30 years of work she has a new breed of dog with interesting traits, but on average, the dogs still bark at about the same rate as the other dog breeds. Which of the following would be a logical explanation for her failure?
The tendency to bark is not a heritable trait
Which of the following statements regarding natural selection is false?
Natural selection starts with the creation of new alleles that are directed toward improving an organism's fitness
Which of the following would prevent an organism from becoming part of the fossil record when it dies?
It is fully decomposed by bacteria and fungi
Which of the following disciplines has found evidence for evolution based on the native distributions(locations) of living species?
Humans share several features with salamanders. Certain genes and proteins are nearly identical between two species, both species have four limbs with a similar skeletal structure; the species' early embryos are very similar; and where the salamander has a functional tail, humans have a vestigial tailbone. In evolutionary terms, these are examples of
Which of the following represents a pair of homologous structures?
the wing of a bat and the flipper of a whale
Deep branch points near the base, or trunk, of evolutionary tree represents ______, while branch points near the tips of the branches represent _______.
relatively ancient common ancestors.....relatively recent common ancestors
Which sentence best describes the true nature of natural selection?
Heritable traits that promote reproduction become more frequent in a population from one generation to the next
Which of the following will tend to produce adaptive changes in populations?
A woman struggling with a bacterial illness is prescribed a month's supply of potent antibiotic. She takes the antibiotic for about two weeks and feels much better. Should she save the remaining two-week supply, or should she continue taking the drug?
She should continue taking the drug until her immune system can completely eliminate the infection. Otherwise the remaining bacteria in her system may recover, and they will probably be resistant
If you had to choose, where would you rather get infected with a serious bacterial disease?
In a remote, sparsely populated area where bacteria have not been exposed to antibiotic drugs
Mothers and teachers have often said they need another pair of eyes on the backs of their head and another pair of hands would come in handy in many situations. You can imagine that these traits would have been advantageous to our early hunter-gatherer ancestors as well. According to sound evolutionary reasoning, what is the most likely explanation for why humans do not have these traits?
Because these variations have probably never appeared in a healthy human. As tetrapods we are pretty much stuck
According to the figure, which pair of organisms shared the most recent common ancestor?
lizard and ostrich
On which of the following did Linnaeus base his classification system?
morphology and anatomy
What is the name of the person who devised a taxonomic system that used morphological(i.e. anatomical) features as the primary criteria for classifying organisms?
What is the most reasonable conclusion that can be drawn from the fact that the frequency or the recessive trait (aa) has not changed over time?
The two phenotypes are about equality adaptive under laboratory conditions.
What proportion of the population is probably heterozygous (Aa) for this trait?
In a Hardy-Weinberg population with two alleles, A and a, that are in equilibrium, the frequency of allele a is 0.1. What is the percentage of the populations that is heterozygous for this allele?
What is the frequency of the B allele?
If one assumes that Hardy- Weinberg equilibrium applies to the population of colonist on this planet, about how many people will have attached earlobes when the planet's populations reaches 10,000?
In which population would it be least likely that an accident would significantly alter the frequency of the brown allele?
If four of the original colonist died before they produced offspring the ratios of genotypes could be quite different in the subsequent generations. This would be an example of..
Which population is most likely to be subject to the bottleneck effect?
If the frequency of a particular allele that is present in a small, isolated populations of alpine plants decreases due to a landslide that leaves an even smaller remnant of surviving plants bearing this allele, then what has occurred?
A, B and C
Over time, the movement of people on Earth has steadily increased. This has altered the course of human evolution by increasing
Natural selections is most nearly the same as
Differential reproductive success
The outcome of the conflict between bacteria and bacteriophage at any point in time results from
Over the course of evolutionary time, what should occur?
Methylated and unmethylated strains should be maintained among both bacteria and bacteriophages, with ratios that vary over time.
During breeding season, one should expect female house finches to prefer to mate with males with the brightest red feathers
All three of these
Which of the following terms are appropriately applied to the situation described in the previous question?
All three choices
If the fossil records of apes and humans alike show a trend toward decreasing larynx size in adult females, and increasing larynx size in adult males, then
Sexual dimorphism was developing over time in these species
Which addition to the information in the paragraph above would make more than one of the answer listed in the previous question correct?
If females killed female offspring whose voices were to deep
When we say that an individual organism has a great fitness than another individual, we specifically mean that the organism
Leaves more viable offspring than others of its species
Which describes an African butterfly species that exists in two strikingly different color patterns?
Which describes brightly colored peacocks mating more frequently than drab peacocks?
Fossil evidence indicates that horses have gradually increased in size over geologic time. Which of the following terms best describes this?
Heterozygote advantage should be most closely linked to which of the following?
YOU MIGHT ALSO LIKE...
Evolution of Populations- Bhare
Grade 9 - Biological Diversity
OTHER SETS BY THIS CREATOR
OTHER QUIZLET SETS
Futures and Options (IFM)
bio exam 4
WH ch 14 and 15 test
Bio Lab Final (UNIT 2)