1.) The law of independent assortment states that the inherbitance of alleles for one trait is not
affected by the interheritance of alleles for a different trait if the genes for the traits are on ____________ chromosomes.
a. seperate
b. homologous
c. the same
d. homozygous
2.) A couple has two children, both of whom are boys. What is the chance that the parents' next child will be a boy?
a. 0%
b. 25%
c. 50%
d. 75%
3.) A female guinea pig homoygous dominant for black fur colors is mated with a male homozygous for white fur. In a litter of eight offsprings, there would probably be:
a. 8 black guinea pigs.
b. 4 black and 4 white guinea pigs.
c. 2 black, 4 gray, and 2 white guinea pigs.
d. 8 gray guinea pigs.
7.) Which of the following nucleotide pair bonds would be found in a DNA molecule?
a. adenine-guanine
b. adenine-thymine
c. adenine-cytosine
d. cytosine-uracil
8.) Which statement below is FALSE?
a. The backstone of a DNA molecule is made of phosphate molecules and dexoyribose sugars.
b. DNA is double stranded, while m-RNA is single stranded
c. DNA is confined to the nucleus, while RNA can move from the nucleus into the cytoplasm.
d. The genetic codon is made up of 4 bases.
9.) The process by which a DNA molecule copies itself is called:
a. mitosis
b. transcription
c. replication
d. translation
10.) Messenger RNA is formed by the process of:
a. transcription
b. translation
c. replication
d. mutation
14.) A DNA segement is changed from -AATTAGAAAATAG to -ATTAGAAAATAG. This is a(n)
_______ mutation
a. frameshift
b. point
c. inversion
d. monoplodiy mutation
15.) The type of inheritance seen when a red-flowering plant is crossed with a white-flowering plant and only pink-flowering plants are produced is:
a. inbreeding
b. incomplete-dominace
c. polygenic inheritance
d. multiple alleles
16.) Because the gene for red-green color blindness is located on the X-chromosome, it is normally not possible for a:
a. carrier mother to pass the gene on to her daughter
b. carrier mother to pass the gene to her son
c. color blind father to pass the gene on to his daughter
d. color blind father to pass the gene on to his son
17.) Eye color in humans is the result of ________ inheritance
a. multiple allelic
b. polygenic
c. sex-linked
d. simple dominant
18.) The blood types A, B, AB, and O are the resluts of ________ inheritance
a. multiple allecic
b. polygenic
c. sex-linked
d. simple dominant
19.) A child is diagnosed with a rare genetic disease. Neither parents has the disease. The disorder was inherited because it is:
a. dominant and carried by one parent
b. recessive and is carried by both parents
c. sex-linked and inherited from the father only.
d. the results of a mutation in the child because neither parents has the disease.
20.) A man heterozygous for blood type A marries a woman heterozygous for blood type B. There is a _______ chance that their first child will have type O blood.
a. 0%
b. 25%
c. 50%
d. 75%
21.) Both hemophilia and red-green colorblindness are:
a. inherited only from the mother
b. caused by a simple dominant gene
c. caused by multiple alleles
d. sex-linked conditions
22.) Which statements is FALSE?
a. All humans have 22 pairs of autosomes and 1 pair of sex chromosomes
b. Karyotypes are pictures of the homologous chromosomes arranged in pairs
c. Karyotypes can help pinpoint cases caused by unusual chromosomes numbers
d. Huntington's disease is caused by 3 chromosomes of the 21st pairs.
23.) In 1974, Stanley Cohen and Herbert Boyers inserted a gene from an African clawed frog into a bacterium. The bacterium. The bacterium produced a protein coded for by the inserted frog gene. The bacteria containing functional frog DNA would be classified as a:
a. clone
b. DNA fingerprints
c. plasmid
d. transgenic organism
24.) The human Genome Project has involved sequencing and mapping the human genome. The most recent benefit of this information has been the dignosis of genetic disorders. Once a genetic disorder is diganosed, possible treatment might be:
a. gene therapy
b. cell cultures
c. DNA fingerprinting
d. PCR
25.) In order to replicate DNA outside living organisms, scientists use:
a. Gel electrophoresis
b. Polymerase chain reaction
c. plasmids
d. vectors
1.) The primitive earth atmosphere is hypothesized to have consisted of:
a. oxygen, nitrogen, and water vapor
b. hydrogen, methane, ammonia, and water vapor
c. amino acid, ATP, carbohyrdates, and oxygen
d. helium, flurione, radon, and xenon gases
2.) The Geologic Time Scale begins at the formation of earth about _______ years ago.
a. 4.6 thousand
b. 4.6 million
c. 46 million
d. a.6 billion
3.) Since the 1950's experiments have been conducted leading scientists to believe that life may have originated:
a. spontaneously from dust
b. in small pools of water where amino acids could be concentrated
c. in rocks affected by ultra-violet radiation and rain
d. ALL OF THE ABOVE
4.) Which group of organisms is believed to have been the earliest to evolve?
a. bacteria
b. land plants
c. aquatic dinosaurs
d. invertebrate sea animals
5.) _________ directly contributed to the evidence of aerobic organisms?
a. An increase in methane concentration in the ancient atmosphere
b. A decrease in the sun intensity
c. The presence of organisms able to carry on photosynthesis
d. An increase in the number of organisms carrying on fermentation
8.) Hawaiian honey-keepers are a group of birds with similar body shape and size. However, they vary greatly in color and beak shape. Each species occupies its own niche and is adapted to the foods available in its niche. The evolution from a common ancestor to a variety of species is an example of:
a. divergent evolution
b. convergent evolution
c. artificial selection
d. inbreeding
9.) The flying squirrel of North America closely resmebles the flying phalanger of Austraila. They are similar in size and have long, bushy tails and skin folds that allow them to glide through the air. The squirrel is a placental mammal while the phalanger is a pouched mammal. Their resemblances, even though genetically and geographically seperated by huge distances, can best be explained by:
a. divergent evolution
b. convergent evolution
c. adaptive radiation
d. vestigial structues
10.) Natural processes such as speciation by chromosmal mutations and gradualism provide the genetic basis for:
a. spontaneous generation
b. evolution
c. biogenesis
d. abiogenesis
11.) Structure and organs that have similar evolutionary origin and structure but that are adapted for different purposes, such as a bird's wing and a human forelimb (arm and hand) are called ________ structures.
a. embryological
b. analogous
c. homologous
d. homozygous
12.) Natural selection can be best defined as the:
a. survival of the biggest and strongest organism in the population
b. elimination of the smallest organisms by the biggest organisms
c. survival and reproduction of the organisms that occupy the largest area
d. survival and reproduction of the organisms that are gentically best adapted to the environment
13.) The average Individuals of a population are favored in ________ selection
a. directional
b. stabilizing
c. disruptive
d. natural
16.) The major anatomical difference between hominids and the apes is that the foramen magnum of hominids is:
a. less developed
b. located at the bottom of the skull
c. thicker
d. ALL OF THE ABOVE
17.) Which of the following groups are representative of the first primates
a. lemurs
b. Old World monkeys
c. New World monkeys
d. apes
18.) Tailless primates that are most like humans anatomically and genetically are:
a. apes
b. Old World monkeys
c. New World monkeys
d. lemurs
19.) Primates are adapted to living in trees because their eyes:
a. are in the front of their head
b. can see color
c. see in binocular vision
d. ALL OF THE ABOVE
20.) As pirmates evolved, they developed:
a. a good sense of smell and large lower vertebrae
b. good visiob and larger teeth
c. more complex brains and upright posture
d. large teeth and a well-developed collar bone
21.) Evidence for bipedal locomotion in an animal can be found by examination of the:
a. pelvis
b. upper arm (humerus)
c. finger (carpal)
d. jaw
22.)The hominid that had the most advanced tool making abilities and spoken language was:
a. Neanderthal
b. Homo erectud
c. Homo habilis
d. Cro-Magnon
23.) Which factor probably played a large role in human evolution
a. a geological event that released much radiation into the environment, which in time resulted in a high mutation rate
b. climatic changes that caused existing primates to search for new food sources
c. flooding due to melting glaciers causing primates to seek refuge in trees
d. massive grassland fires that caused existing primates to flee to the moutains
24.) Which of the following statements is FALSE?
a. Carlous Linneus invented the two-name classifications system using Latin and based on characteristics of organisms
b. Modern taxonomists use a binomical nomeclature system
c. All organisms are now classified based on their common names in any language
d. The classification system known as cladistics is based on phylogeny, the evolutionary history of organisms
25.) Which of the following is the correct order from larger to smaller taxa?
a. Kingdom, domain, phylum, genus, family, species, order, class
b. Domain, class, order, family, kingdom, phylum, genus, species
c. Domain, kingdom, phylum, class, order, family, genus, species
d. Kingdom, domain, phylum, class, family, order, genus, species
Can you help me please in biology im failing?! [thank yu].?
if u are failing that doesn't mean that u'll not solve your study questions. this might be the reason of your failure don't search a shortcut to everything.
Reply:Those who don't know the subject should fail it.
Maybe next year if you repeat you might want to try actually listening in class. Report It
Reply:I would help you with some of the questions, but sorry I'm not going to do all your work for you. If you want to post here what you think your answers are and why you think those are the correct answers I will be happy to look at them and give you feedback.
Reply:I will give you one answer because you're only supposed to post one question at a time. The answer to question 7 is b. Adenine always bonds with thymine and cytosine always bonds with guanine in a DNA molecule.
Reply:i agree with the others who have answered this question. I would like to help you with some of the questions.
2. 50% (Punnet square)
7. b (Adenine- Thymine)
8. d (genetic codon is only made up of 3 bases)
9. c (DNA replication
14. frameshift (deletion of a base)
15. incomplete dominance (blending inheritance)
16. d (because the father can only contribute his Y chromosome while his mother can contribute the X chromosome)
23. clone
24. a. gene therapy
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