Biology question and answers for November 25, 2023
- Q 15 2 points Which of the following does NOT describe one of Darwin s postulates the criteria for evolution by natural selection A Some individuals are more likely to survive...
- Q 4 Which of the following correctly describes Mendel s Law of Segregation a Alleles on different chromosomes assort independently of each other b During gamete formation each gamete contains only...
- Q 10 Spot size on ladybugs is controlled by one gene In a certain population of ladybugs you observe some individuals with small spots other individuals with medium spots and still...
- Q Spot size on ladybugs is controlled by one gene In a certain population of ladybugs you observe some individuals with small spots other individuals with medium spots and still other...
- Q Question D A true breeding purple flowered plant is crossed with a true breeding white flowered plant of the same species In the F1 generation all lavender flowered plants are...
- Q Exchange of genetic material between 2 different strands of DNA is called:NONE OF THESEmutationrecombinationdimerizationmodification
- Q For species that do have different sexes, sex is not determined the same way-give examples of how sex can be determined in ways other than through the XY chromosomal system...
- Q Hemophilia in humans is an X-linked recessive trait. Which of the following statements is CORRECTabout a man who has hemophilia and whose wife does not have the disease and who...
- Q The condition of being a Guevedoce is recessive. Describe what must be true about the parents for a person to inherit the condition.The parents must each have at least one...
- Q In rabbits, gray hair is dominant to white fur. Also in rabbits, black eyes are dominant to red eyes. What are the phenotypes of rabbits that have the genotype: Ggbbgray...
- Q You have sampled a population in which you know that the percentage of the homozygous recessive genotype (aa) is 41 %. Using that 41%, calculate the following:A. The frequency of...
- Q In pea plants, round seed shape is dominant to wrinkled seed shape. What is the probability of obtaining a wrinkled seed plant from a monohybrid cross?
- Q a. Which sex is typically assigned at birth to an individual with XXY chromosomes?b. If a person with Klinefelter's syndrome wanted to look more like an average male, what medical...
- Q Which of the following would be considered sex-chromosomes?A. only chromosomes in the 23rd pairB. all of the odd numbered pairs of chromosomesC. pairs 1-22D. all chromosomes are sex chromosomes
- Q Use the key below to complete the two punnett squares for the colour of cats. For each, show the punnett squares as well as indicate the genotype and phenotype ratios...
- Q What will be the chance for a woman, whose father was colourblind and who is married to a man with normal vision, to have a colour blind child? Assume: XB...
- Q Hemophilia is an X-linked disorder and more frequently affects men. True False
- Q Given a cross between these two parents:BbCcDDEEFfGgHhjj xBbCcddEeFfGgHHjjwhere traits B, E, H, J exhibit Mendelian inheritance; C, and F exhibit incomplete dominance; D, and G exhibit co-dominance answer the following:1....
- Q In mammals, males often have greater variance in reproductive success than females, as a result of sexual selection. How will this alter the effective levels of allelic variation in genes...
- Q Genetic bottlenecks and founder effect both...Tend to reduce genetic diversityInvolve migrationTend to increase genetic diversityInvolve the killing of large numbers of the population.
- Q A deletion mutation of three nucleotides results in a frameshift mutation.TrueFalse
- Q 2. Sex linked traits such color blindness or hemophilia affect males more becauseThe Y chromosome is longer than the X chromosomes, and hence has more genesThe Y chromosome is shorter...
- Q If one parent has blood type AB, and the other has blood type O, what is the probability they would have a child with blood type A?50%75%0%25%
- Q Which of the following is an example of an extended phenotype?Height in humansRed Eye vs White Eye phenotype in fruit fliesThe size of the gall made by the gallfly eggs...
- Q the expression of a regulated gene is turned OFF in prokaryotic cells. This means...the protein specified by the gene is madecell needs the protein specified by the genetranslation occursreplication occurstranscription...
- Q What is a likely consequence of this type of mutation? A. The gene would result in a shorter protein, possibly causing problems. B. The gene would have a protein that...
- Q Imagine 2 plants are crossed. The dominant flower color is red (R) and the recessive flower color is white (r). a. For a heterozygous parent (they have one of each...
- Q Sickle-call anemia is an interesting genetic disease. Normal homozygous individuals (55) have normal blood cells that are easily infected with the malarial parasite. Thua, many of these individuals become very...
- Q The following pedigree shows a person affected with the sex chromosome aneuploidy called Klinefelter syndrome (XXY). Recall that human aneuploidy is caused by nondisjunction during meiosis. A and B are...
- Q Competent cells allow for what critical step of DNA cloning? Introducing the DNA of interest into a plasmid. Transforming the recombined DNA plasmid into the host cell line. Cutting different...
- Q A chromosomal mutation is best described as an amino acid substitution that changes all of the subsequent protein codes on the chromosomea change in the genetic make-up of an organism...
- Q Assuming eye color (w/w+) and wing size (m/m+) are X-linked, predict F1 offspring from a cross between a double mutant female and a wild type male. Show the X and...
- Q In the cross between two individuals heterozygous for two different traits, it is expected that a 9:3:3:1 ratio of phenotypes will occur in the offspring. Yet, a ratio of 6:6:2:2...
- Q Four o'clock plants exhibit incomplete dominance that express the following:FF- red flowerFf- pink flowerff-white flowerIf we cross the parents: White x Pink, what is/are the genotype(s) of the offspring?FF and...
- Q Match the disease with its type of inheritance.Sickle Cell DiseaseHuntington's DiseaseCystic Fibrosis
- Q In humans, hemophilia is a sex-linked trait. Females can be normal, carriers, or have the disease. Males will either have the disease or not (but they won't ever be carriers)....
- Q You breed a plant that has purple flowers with a plant that has orange flowers and the resulting offspring has purple and orangestripe flowers. What type of heredity does flower...
- Q In some breeds of cats, there are alleles for black color and tan color. Neither of these alleles is dominant over the other. When a cat of one of thesebreeds...
- Q The pH of muscle/meat is a measurement of acidity. In a normal livingmuscle the pH is approximately 7.2. A low pH results in meat proteinshaving decreased water-holding capacity and a...
- Q Howard has brown eyes (Bb) and Bernadette has blue eyes (bb). Their daughter also has brown eyes (Bb). What termdescribes the genotype of Howard and Bernadette's daughter?Homozygous RecessiveHomozygous DominantDihybrid CrossHeterozygous
- Q In a laboratory, a scientist gathered identical E. coli cells and grew them in separate petri dishes labeled as population A, population B, and population C. With plenty of food...
- Q you perform a test-cross with a pea plant with the genotype Yy, count 1000 offspring,and get 670 plants with yellow seeds and 330 plants with green seeds. What are yourexpected...
- Q A scientist isolated DNA from a particular bacterium and decided to analyze it. The sequence of the bacterial DNA is ATGGGCTAGTCTT. What will the complementary strand be?A TACCCGATCAGTTAB. TACCCGATCAGAAC TACCCGAGGCGAAD....
- Q Scientists cross two heterozygous pea plants with purple flowers together. The purple allele (A) is completely dominant and the white allele (a) is recessive. What is theprobability the offspring will...
- Q A single clone of interest can be distinguished from others in a mixture of clones bytesting the clones for antibiotic resistance.mobility of the clones in gel electrophoresis.a specific probe, usually...
- Q In the 1950s, the scientists Alfred Hershey and Martha Chase carried out an experiment usingbacteriophages, which are viruses that infect bacteria. During the experiment, the scientists allowedbacteriophages that had been...
- Q In some flowers, there are two alleles for color, and these can both be expressed equally at the same time. Which best describes this trait?A. Dominant.B. Sex-linked.C. Codominant.D. Asexual.
- Q Mr. (aa) and Mrs. Johnson (AA) have a child named Joe. What is Joe's genotype?aaAAAAAAa
- Q A scientist is breeding flowers. They select a heterozygous individual with a dominant phenotype. A is completely dominant, and a is recessive. What is the possible genotype(s) of this flower?AaaaBAA
- Q You've discovered a deletion mutant of E. coli that cannot induce transcription of the lac system under any circumstances. Which of the following deletions could cause this phenotype?Deletion of the...
- Q In the lab simulation, given that BB moths are black, bb moths are white, & Bb moths are grey, what type of genetic DOMINANCE is operating between the two alleles...
- Q The DNA of a mouse is analyzed to reveal the presence of alleles resulting in brown fur color. The mouse is heterozygous, Bb, yet is completely colorless in phenotype. This...
- Q Following the Lederberg experiment, a scientist plated E. coli cells onto an agar plate with rich media and 125 colonies grew on this master plate. The scientist then replica printed...
- Q 13. In hamsters, the CW allele produces a white-coat color phenotype. C is the wildtype allele and results in an orange coat color. A cross between a homozygous orange hamster...
- Q Which is true about mutations?A. They are always beneficial.B. They are always harmful.C. They are mostly neutral and unnoticed.D. They are always either beneficial or harmful.
- Q How do we know that alleles actually separate during gamete formation? A. Scientists are unsure whether the alleles separate. B. If the alleles did not separate, recessive alleles would never...
- Q Assume brown eyes (B) are dominant to blue (b). A brown-eyed man marries a blue-eyed woman. They have three children, two of whom are brown- eyed and one of whom...
- Q In pea plants, the trait for yellow seeds (Y) is dominant to that for green seeds (y). If a plant that is heterozygous for seed color is crossed with a...
- Q What is the most important difference between nuclear DNA and mitochondrialDNA?Mitochondrial DNA does not use the same replication machinery as nuclear DNAThere is no differenceMitochondrial DNA is inherited via ovum,...
- Q A plant that was homozygous recessive for seed shape and color was crossed with a plant that was heterozygous for seed shape. What percentage of the F1 generation will be...
- Q Refer to #3b. A woman with sickle cell disease has children with a man who has sickle cell trait. What is the genetic makeup of the gametes the mother can...
- Q Holandric genes are carried on the Y chromosome in men and have no analogous genes in women. A holandric gene is known in men, which causes long hair to grow...
- Q 1) For the scenario below, indicate which of the following "phenomena" is at work. More than one mayapply.Co-Dominance - Epistasis - Incomplete Dominance - Pleiotropy - Polygenetic2) Explain how you...
- Q Variations in the ___ sequence of a gene can affect how quickly the encoded protein is synthesized.tripletpalindromepromoterterminatoranticodon
- Q In watermelon, the allele for green rinds is completely dominant to the allele for striped rinds. You are given a melon with a green rind and asked to establish a...
- Q The following parts of natural selection will be used to answer the next 4 questions.A. Differential ReproductionB. OverproductionC. Struggle to SurviveD. Genetic VariationWhich part of natural selection (see choices above)...
- Q Several answers can be correct. If this is the case youwill need to check all the correct answers.A trait or a charactera. is described by a word, either a noun...
- Q If the first child of the parents in problem 5 is feeble-minded, what is the probability that the second child will be feeble-minded? (This is akin to asking the question,...
- Q What will be the genotype(s) of the F, generation from the following parents? In what ratios? (Hint: first determine the types of gametes each parent can form, and then combine...
- Q Wood rats are medium sized rodents with lots of interesting behaviors. You may know of them as packrats. Let's assume that the trait of bringing home shiny objects (H) is...
- Q In dogs, dark coat color is dominant to albinism, and short-haired coat is dominant to long-haired coat.a If a dog pure-breeding for dark, short-coat is crossed with an albino, long-haired...
- Q After transcription and before translation, eukaryotic mRNA is modified by addinga cap of modified nucleotides and a poly-A tail.an AUG at one end and a poly-U tail at the other.tRNAs...
- Q In Guinea pigs, black hair (B) is dominant over white (b), rough coat texture (R) is dominant over smooth (r), and short hair (S) is dominant over long hair (s)....
- Q A color blind male mates with woman who has normal vision. The woman has no history of colorblindness in her family.What percentage of their sons are expected to be colorblind?A)...
- Q Which organism that was the first to be used to relate the behavior of chromosomes during melosis to Mendel's principles of Segregation and Independent Assortment?(A) Garden peas(B) Summer squashC) DrosophilaD...
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