Biology question and answers for November 24, 2023
- Q Being right-handed is an autosomal dominant trait over being left-handed. Hitchhikerthumb is dominant over straight thumb trait.Mary is right-handed and has a hitchhiker thumb.Mary's mother is left-handed and has a...
- Q In dogs, short fur is recessive and long fur is dominant in an autosomal gene F. The classic moustache and eyebrows seen in schnauzers is an autosomal dominant trait (use...
- Q A girl has dimples (dominant trait of autosomal gene D) and a cystic fibrosis (recessive disease from autosomal gene F). Which of these COULD be the genotype of her FATHER?...
- Q Black fur in mice is dominant to brown fur.Short tails are dominant to long tails.In a cross of Bb Tt x bb Tt, what fraction of the offspring will have...
- Q Which are possible gametes of an organism that has Aa BB genotype? Genes A and B are autosomal.Mark all correct answers.ABAbaBaaAaabbbBb
- Q In corn, red kernel color (R) is dominant to yellow (r) and smooth kernel texture (W) is dominant to wrinkled (w).Corn heterozygous for kernel color and kernel texture are fertilized...
- Q The two interesting types of people who led researchers to discovery of the SRY gene wereXXX females and XYY males.XY males and XX females.XX males and XY females.physicists and chemists.
- Q A human male inheritsan X chromosome from his mother and a Y chromosome from his father.his father's Y chromosome and an X chromosome from either his father or mother.an X...
- Q Human females are the ________ sex.homogametichomozygoushemizygousheterozygous
- Q A type of rickets is a X-linked dominant trait. A female heterozygous for rickets and anunaffected male are expecting a child. Determine the chances of this child inheritingthis type of...
- Q In humans, hemophilia is a X-linked recessive trait. If a female who is a carrier forhemophilia marries a male with normal blood clotting have a child together.Determine the possible genotypes...
- Q In humans, Ichthyosis is a X-linked recessive disorder that causes persistently dry, thickened, 'fish scale' skin. Rosa and Stefan's newborn son Alan has been diagnosed with the disorder. Rosa and...
- Q Human males are thehomozygousheterozygoushomogameticheterogameticsex.
- Q Hemophilia is a sex-linked recessive condition that results in deficient blood clotting. The disease causes excessive bleeding which occurs spontaneously or upon slight injury. In dogs (as in humans) hemophilia...
- Q Which of these illustrates pleiotropy?the genes for red eyes and hairy body in fruit flies are located on the same chromosomehuman cystic fibrosis causes many symptoms from respiratory distress to...
- Q Trevor's biologic mother has type A blood and his biologic father has type B blood. Based on this information, it is correct to say that:must have type A bloodmust have...
- Q Your phenotype (hair color, eye color, blood type) is due to the specific __that your DNA codes the production of. Select one:a. RNAb. Carbohydratesc. Lipidsd. Proteins
- Q Allison has a newborn child that was the result of a sperm donor conceptions. She recently found out that the donor died from complications of neurofibromatosis type 1 (autosomal dominant)....
- Q Cat fur color is determined by codominance. The allele for tan fur (TT) and the allele for black fur (BB) are codominant. The heterozygous condition (TB) results in a cat...
- Q Duchenne muscular dystrophy is a sex-linked recessive trait like other sex-linkedrecessive traits such as Hemophilia or red/green color blindness that we talkedabout in class. Complete the following Punnett squares and...
- Q A long-eared mouse heterozygous for blue fur and homozygous recessive for the tailless condition is crossed to a blond mouse heterozygous for both a long tail and short ears. Using...
- Q Note: Gender in fruit flies is determined by the composition of the sex chromosomes, X & Y; females are XX and males are XY. In fruit flies, a new mutant...
- Q While doing a pedigree analysis of a royal family from the ancient Mayan empire, you notice that a prince with a genetic disease married a person from outside the royal...
- Q You are attempting to determine the genotype of your C. bonita plant, which generates blush-colored blooms. A quick search tells you that pink blooms are the dominant phenotype; aqua blooms...
- Q If you cross Pure agouti x pure black, what is/are the offspring phenotype(s)?all black50% agouti, 50% black75% agouti, 25% blackall agouti
- Q An X-linked recessive gene c produces red-green color blindness in men. A normal woman whose father was colorbling marries a colorblind man.a What genotypes are possible for the mother of...
- Q In humans, hemophilia is a sex-linked recessive trait. A female who is a carrier forhemophilia marries a male with normal blood clotting. If they do not know the genderof their...
- Q For rock pocket mice, which of the following contributes to selective pressure favoring dark-colored fur? (select all that apply)rock colorgenetic mutationspredatorsavailability of food for the rock pocket mice
- Q When Watson and Crick were first proposing their model for DNA, they thought thatthe nitrogenous bases paired like with like (ie adenine with adenine). This turned outnot to be feasible...
- Q The male-specific region of the Y chromosomelies between the two pseudoautosomal regions.has regions called amplicons that include few palindromic sequences.is completely identical to its counterparts on the X chromosome.has an...
- Q In humans, having dimples in the cheeks is a dominant trait. If a child has dimples butonly one of her parents does, what are the genotypes of her parents? (D...
- Q The belief in the blending of traits was changed by Mendel's pea experiments. Mendel supported inheriting discrete.A. allelesB. DNAC. genesD. factors
- Q Two plants are crossed, resulting in offspring with a 3:1 ratio for a particular trait. What does this suggest?that the trait shows incomplete dominancethat the parents were true-breeding for contrasting...
- Q For a species with a haploid number of 23 chromosomes, how many different combinations of maternal and paternal chromosomes are possible for the gametes?9204646023about 8 million
- Q Peas were a good organism of choice for Mendel becausethey cannot self-fertilize.they cannot cross-fertilize.the traits were difficult to visualize.he could study one trait at a time.
- Q Which of the following did Mendel conclude about patterns of inheritance?An organism inherits one gene from each parent.The two genes of a given trait separate, or segregate, during gamete production.Similar...
- Q In cats, an autosomal dominant mutation R causes a rounded ear shape. Anautosomal dominant mutation F causes feet with fewer toes.A male cat Ff RR mates with a female cat...
- Q Select the correct answer.Jason adds the antibiotic penicillin to a bacterial culture. The bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. What caused...
- Q 2.One variety of strawberry is resistant to a damaging fungus, but produces small fruit. Another strawberry variety produces large fruit, but is not resistant to the same fungus. The two...
- Q If all four heart valves are closed and the ventricular myocardium (heart muscle) is contracting the phase of thecardiac cycle isDiastole: sovolumetric contractionSystole, Isovolumetric contractionDiastole: Isovolumetric relaxationSystole. Isovolumetric relaxation
- Q Height exhibits simple dominance, but petalcolor is incompletely dominant in xenon plants.If T= tall, t= dwarf, R= red, r= white, whichgenotype(s) would most likely express colorother than white or red?ATTRr...
- Q TT x ttAll of the offspring in the F1 generation of theabove cross would have thegenotype.AttBTTCTt
- Q RRYY x rryyWhat potential gametes can be produced by thedihybrid cross shown above?A. RY, RYB. Rr, YyC. RY, ry
- Q RrYy x RrYy(round and yellow are dominant)Considering the P1 above, what are the chancesthat the F1 generation will have yellow, wrinklyseeds?A. 1/8B. 3/16C. 1/16
- Q If 72 out of 200individuals expressthe recessivephenotype, whatpercentage will behomozygousdominant?A. 16%B. 24%C. 36%D. 17%
- Q Mendel identified thatonly _ of each factor isinherited from theprevious generation.A. two exact copiesB. the paternal versionC. a maternal or paternal copyD. the maternal version
- Q Structure 1 iscalled a chromatid.Two of themtogethermake a [?].A. chromosomeB. centromereC. chromatid
- Q A volcano wipes outan entire populationof lizards. This is anexample ofA. the Founder Effect.B. a Small Population Effect.C. Sexual Selection.D. the Bottleneck Effect.
- Q A plant is homozygous for the production of yellow seeds (YY) andhomozygous for wrinkled seeds (rr). What possible gametes will this plantproduce?A. YR, Yr, yR, and yrB. Y, y, and...
- Q The Law ofIndependentAssortment states thatcombinations of factorswill be______.A. occasionally inheritedB. randomly inheritedC. from mom onlyD. from dad only
- Q Without variation there can be noevolution by [?].A AcquiredCharacteristicsB NaturalSelectionC weakindividuals
- Q Anything other than aratio of (tan andblack) is a result ofrecombination.A. 4:4B. 2:2:2:2C. 2:4:2D. 2:2:4
- Q Which of the following described the HeLa karyotype?A. She was XXY.B. She was XXX.C. She was XY.D. She was XX.
- Q Snakes and lizards each have vertebrae and ribs. Which of the following possibilities would best explain why snakes lack legs?Lack of inner cell massLack of Bicoid gene activityLack of a...
- Q Provide three specific examples where someone would benefit from an understanding of genetics. Your examples must illustrate DIFFERENT circumstances when an understanding of genetics would be beneficial or when a...
- Q The name most associated with discovering modern genetics is A. Anton Van Leeuwenhoek.B. Gregor Mendel.C. Charles Darwin.D. Robert Hooke.
- Q The specific gene location on a chromosome is called a ___A. locusB. centromereC. DNAD. genome
- Q GR = HD?: H? HR? HD2 H? : HR2In the geneticist shorthand shown above, what does HD? stand for?Homozygous dominant for the 2nd traitHomozygous dominant for the 1st traitHeterozygous recessive...
- Q Northern elephant seals have reduced genetic variation because hunting by humans reduced their population size to as few as 20 individuals at the end of the 19th century. Their population...
- Q A wealthy, elderly couple die together in an accident. Soon, a man shows up to claim their fortune, contending that he is their only son who ran away from home...
- Q In snapdragon plants, red flowers are incompletely dominant to white flowers. The heterozygous form will produce pink flowers. What is the chance of producing a white flower, from a cross...
- Q Assume that curly hair (L) is dominant to straight hair, and albinism (a) is recessive to normal skin pigmentation. A woman, Nicole, who is heterozygous for curly hair and is...
- Q Horses are either trotters or pacers. A male trotter, Semilore, mates with three different females, and each female produces one foal. The first female, Sonya, who is a pacer, gives...
- Q In cats, coat colour is an example of codominance. Homozygous genotypes are expressed as either black or yellow; the heterozygous genotype is expressed as tortoise-shell. What phenotypes and percentage of...
- Q In some chickens, the gene for feather color is controlled by codominance. The allele for black is b andthe allele for white is w. The heterozygous phenotype is known as...
- Q 2. In cats, the allele (B) produces black color but (Y) produces a yellow color. These alleles are incompletely dominant to each other. A heterozygote produces a tortoise shell color....
- Q Penicillin is a drug that kills bacteria. Today, many bacteria are resistant to this drug.How does natural selection best explain this observation?Some bacteria survive penicillin and reproduce, while others die...
- Q Choose the cause of the mutation for the scenario below:Mary and Tom do not have Down Syndrome, but they have a child, Larry, who has Down Syndrome.Nondisjunction during meiosisEnvironmental factors...
- Q Scientists have genetically engineered a fruit fly ("Fly Zero") that can reproduce asexually; Fly Zero can clone itself so that all of their offspring will beidentical to Fly Zero and...
- Q Sometimes mutations occur so that a nucleotide is removed from a DNA sequence. In the mutated sequence below, a nucleotide has been deleted due to a mistake during DNA replication....
- Q Alzheimer's disease is thought to be caused by a genetic mutation that causes abnormal expression of the amyloid precursor protein (APP). Patients with Alzheimer's disease have abnormally high expression of...
- Q Which of the following statements best describes people who are intersex?A They possess no reproductive organs.B They possess reproductive organs of both sexes.C Their reproductive organs do not produce enough...
- Q The company 23andme is a personal genetic testing company that will tell you your genotype for many different traits. Here is one gene and the associated phenotype that they can...
- Q Read the following passage from the Biology Department at University of California, Berkeley.Northern elephant seals have reduced genetic variation because hunting by humans reduced their population size to as few...
- Q Tim and Stephanie are devastated when they find out their newborn son has hemophilia a sex-linked recessive disease. Tim is shocked becaused he doesn't have hemophilia, and figures if his...
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