Biology 110

39 Questions  I  By Katierae

  
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1.  You are working for a fruit fly geneticist who sends you to a produce market to find new mutations. You rummage through the dumpsters and capture 100 flies. You note that 100% of the flies have red eyes and 90% have long body bristles (10% have short body bristles). Based on these results, you can conclude that:
A.
B.
C.
D.
2.  A child involved in a paternity suit has type O blood. Which one of these genotypes would EXCLUDE a man from being this child’s father?
A.
B.
C.
D.
3.  Tay-Sachs disease is a genetic disorder that causes degeneration of the nervous system, is inherited as an autosomal recessive and is lethal by age five. The frequency of carriers of the Tay-Sachs allele is 1in 50 in the French Canadian population. What is the approximate frequency of babies born with Tay-Sachs disease in this population?
A.
B.
C.
D.
4.  The boundary between the Triassic and Jurassic is marked by a significant mass extinction event, the second largest in Earth’s history. This photograph from a road cut in Utcubamba, Peru shows this boundary in the rock layers. If the age of this boundary is 201 million years ago, a fossil found at position A would be:
A.
B.
C.
D.
5.  You have a friend who is looking for a mate for her male black lab (his mother was yellow with a brown nose). She chooses a female yellow lab with a brown nose. What would be the expected phenotypes and ratios in the puppies?
A.
B.
C.
D.
6.  In this pedigree showing the inheritance of a genetic disorder within a family, the genotype of the individual marked "IVA" is most likely
A.
B.
C.
D.
7.  A form of diabetes, renal diabetes insipidus, is inherited as an X-linked dominant trait in humans. A man without diabetes marries a woman who has diabetes; her mother also had this disease but her father did not. What is the possibility that this couple will have a son with renal diabetes insipidus?
A.
B.
C.
D.
8.  A woman has red-green colorblindness; her mother has normal color vision. Which of the following statements must be true?
A.
B.
C.
D.
9.  You are recreating Mendel’s experiments with garden peas. You have a plant with round seeds (R) but you do not know its genotype. To determine this, you would cross it to a pea plant with the genotype:
A.
B.
C.
10.  You are working at an archaeological site, Danger Cave in Utah; this site was occupied by humans for thousands of years. At that site, there is a burial area with both human and dog graves, providing evidence that dogs were domesticated and living with human groups at that time. You are investigating the possibility that this is early evidence for the domestication of dogs. The dog thigh bone sample that you are working with contained 6 gm of C14 at the time the dog died. It now contains 1.5 gm. This dog was buried approximately ________ years ago.
A.
B.
C.
D.
11.  This pedigree shows the inheritance of an autosomal dominant condition. If Jim and Kay (both marked by an *) have another child, what is the likelihood that child will inherit the condition?
A.
B.
C.
D.
12.  For all of the characters that Mendel observed, when two plants from true-breeding lines for two different traits were crossed, one of the traits disappeared in the P1 generation, then reappeared in the P2 generation. This is because all of these characters showed:
A.
B.
C.
D.
13.  In Australia, all large land animals that weighed more than 165 pounds appear to have gone extinct around 50,000 years ago in an event called the Australian Megafaunal Extinction. A lab at the University of Colorado has been using amino acide racemization to narrow the time window for this extinction. They measure the racemization rate of the amino acid Isoleucine in eggshells of large, flightless birds, from both an extinct species, Genyornis, and a species that is still living today, the Emu. If you compare the egg shells of a freshly laid Emu egg compared to a Genyornis egg that is 50,000 years old, you would expect to find:
A.
B.
C.
D.
14.  Hemophilia is a sex-linked recessive trait. A man with hemophilia is married to a woman without hemophilia; her father has hemophilia. What is the probability that their next male child will have hemophilia?
A.
B.
C.
D.
15.  In Drosophila, the gene for yellow body (yb) is found on Chromosome 2. The gene for bent wings (b) is found on Chromosome 4. A fly that is heterozygous for both traits (yb+ yb b+ b) can make four different possible gamete types: yb+ b+, yb+ b, yb b+, yb b. This is because of:
A.
B.
C.
D.
16.  In Drosophila, curly wings (Cy) are dominant to normal wings (Cy+). You have a fly with curly wings and want to find out if it is homozygous or heterozygous for that trait. You would use a fly with the genotype ______________ to determine this.
A.
B.
C.
D.
17.  Which of these places the meiotic events that can lead to genetic variation among gametes in the correct order (earliest to latest during meiosis)?
A.
B.
C.
D.
18.  An individual with the genotype AaBbCCDdeeFf can produce gametes with _________ different genotypes.
A.
B.
C.
D.
19.  In the oral history of a Native American tribe, there are several references to a period of very hot, dry summers when crops failed and the people starved. You have decided that __________ offers you the best way to determine when these droughts occurred.
A.
B.
C.
D.
20.  You have a friend who is a carrier for cystic fibrosis. She is engaged and asked her fiancée to have a genetic test; it showed that he is also a carrier. If they plan to have three children, what is the probability that they will have two unaffected children and one child with cystic fibrosis?
A.
B.
C.
D.
21.  There are many different patterns of inheritance for characters. If you see a character that has a roughly normal distribution of phenotypes in a population, for example, eye color in humans, that character most likely shows _____________ inheritance.
A.
B.
C.
D.
22.   This picture shows a type of flower called a forget me not (genus Myosotis). Based only upon the information in this picture, what is the most likely pattern of inheritance for this character in these flowers?
A.
B.
C.
23.  You are studying a species of organ pipe cactus in Utah and discover that the cells in the cactus stems have 22 chromosomes. How many chromosomes would be found in the gametes of this species?
A.
B.
C.
24.  Which of the following terms describes a cross between an individual expressing a dominantly expressed trait, but of unknown genotype, and a homozygous recessive individual?
A.
B.
C.
D.
25.  In Drosophila, two genes on the fourth chromosome, bent wings (b) and shaven bristles (svn) are completely linked. If a fly with the genotype bb svnsvn is crossed to a fly with the genotype b+b+ svn+svn+, what type(s) of gametes will their offspring produce?
A.
B.
C.
D.
26.  You are taking Mendel’s work one step further and doing a dihybrid cross between two plants with the genotype PpYy (the phenotype is purple flowers and yellow seeds). What proportion of their offspring will have the phenotype purple flowers and green seeds?
A.
B.
C.
D.
27.  A phenotypic ratio of 1:2:1 in the F2 generation of a monohybrid cross is best explained by:
A.
B.
C.
D.
28.  During the human life cycle, the process of _______________ is responsible for growth and maintenance of an individual; the only ______________ cells are the gametes, sperm and eggs.
A.
B.
C.
29.  Which of the following features can only be found in a pedigree of a genetic disorder, such as sickle cell anemia, that is caused by a recessive mutation with autosomal inheritance?
A.
B.
C.
D.
30.  In Zea mays (maize or corn) the allele for kernel color (C) is dominant to colorless (c) and full kernel shape (S) is dominant to shrunken (s). A plant with kernels that have color and full shape (CCSS) is crossed with another plant that is homozygous recessive at both genes (ccss) to yield F1 offspring that are heterozygous at both genes. A test cross is then done using an F1 individual and four classes of offspring are produced as follows (total = 2000):
  • Full color, full shape   963
  • Full color, shrunken shape   38
  • Colorless, full shape   42
  • Colorless, shrunken shape   957
Based upon these results, the map distance between the c and s genes is estimated to be:
A.
B.
C.
D.
31.  This image shows a pair of homologous chromosomes with three linked genes indicated (genes A, B, and C). Which of the following statements is true with respect to these genes?
A.
B.
C.
D.
32.  Which of the following is not true of X-inactivation?
A.
B.
C.
D.
33.  Which one of these statements is NOT true of mitosis?
A.
B.
C.
D.
34.  In Drosophila, wild type wings (vg+) are dominant to vestigial wings (vg). You cross a true breeding fly with wild type wings to a true breeding fly with vestigial wings (the P generation). They you allow their offspring (the F1 generation) to mate. You determine the wing shape for 1000 offspring in the F2 generation. Your expectation is that about _________________ of these flies will be heterozygousvg+vg.
A.
B.
C.
35.  For a diploid organism, Mitosis and Meiosis II are very similar except that ________________ Meiosis II.
A.
B.
C.
D.
36.  This image shows a partial map of chromosome 2 in Drosophila melanogaster. The numbers below the genes indicate the distance of each gene from the gene for short aristae. Which of the genes shown on this map is/are linked to the gene for short aristae at a map distance that can be calculated by doing a dihybrid cross?
A.
B.
C.
D.
37.  What proportion of the female’s gametes is expected to have the genotype (yb cw+)
A.
B.
C.
D.
38.  Which of the following crosses could have given rise to the females used in the cross described above? Assume that all individuals are true breeding.
A.
B.
C.
D.
39.  Based upon these results, the map distance between the yb and cw genes is estimated to be
A.
B.
C.
D.
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