Q: If there are three genes and you want to determine the distance between these genes, what are you…
A: Recombination frequency is used as a quantitative measure of the distance between two genes in a…
Q: Could there be any significance to the fact that the crosses concern genes on a very small…
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: For linkage analysis, a test cross is used rather than a hybrid cross. Why is this essential? Why…
A: Test cross allows to measure the frequency of gametes indirectly which is made by an individual.…
Q: For linkage analysis, a test cross is used rather than a hybrid cross. Why is this essential? Why…
A: Gene mapping signifies the determination of the locations of the components in a genome with…
Q: In mice, there is a yellow strain that when crossed yields 2 yellow:1 black. How could you explain…
A: The genetic characteristic of an organism is known as genotype, and their expression results in…
Q: What happens during duplication?
A: Mutations are defined as the permanent change in the DNA’s base sequence. An agent that causes…
Q: What are mutational breeding?
A: lets understand what mutation means so that the further solution can be of sense. a mutation is a…
Q: What do you imagine “routine crosses” are to a corn breeder?
A: In botany, plant breeding is defined as the alteration in the different genes or traits of the plant…
Q: For genes that are close together, the frequencies ofcotransformation or cotransduction are…
A: Transduction is the process by which foreign DNA is introduced into a cell by a virus or viral…
Q: Who is the proband in a pedigree? Is the proband always found in the last generation of the…
A: Pedigree analysis is a scientific approach that helps to study the inheritance of genes. In this…
Q: What is a gene family? How are gene families produced over time?With regard to gene function, what…
A: Gene is known to be a hereditary unit. They are composed of DNA or deoxyribonucleic acid and some of…
Q: How many molecules of DNA are in Mendels Sweet pea plants?
A: Gregor Johann Mendel was a scientist who conducted many experiments on the pea plant between 1856…
Q: What is tandem and non tandem duplication?
A: A major mechanism by which new genetic material is produced during molecular evolution is gene…
Q: Explain why the value of the recombination frequencybetween any two genes is limited to 50%.
A: Recombination frequency is the proportion of a number of recombinant offspring resulted from a…
Q: What is a gene with only one common, wild-type allele?
A: The coding region of the gene is known as allele. Wild-type alleles are the original form of the…
Q: For two genes that are genetically unlinked but physically linked because they are on the same…
A: Two genes are said to be genetically unlinked when they assort independently. The genetically…
Q: Referring to the Meselson-Stahl experiment, what is the % hybrid (15N - 14N) in the 5th generation?
A: The Meselson-Stahl experiment was able to show that DNA (deoxyribonucleic acid) replication occurs…
Q: With regard to genotypes, what is a true-breeding organism?
A: A genotype is the genetic expression of an organism, AA, Aa, aa are examples of genotypes, 1:2:1 of…
Q: What is meant by test cross and how is it significant to genetics?
A: The branch of biology that deals with the study of genes, heredity and genetic variations are termed…
Q: What are the techniques in solving pedigree problems?
A: Techniques of solving pedigree problems:- A step wise guide to mastering pedigree questions: -…
Q: In a three-point testcross such as this one, why aren’t the F1 and the tester considered to be…
A: The three-point test cross is used to determine the three genes in loci of a genome organism. The…
Q: What is the most convenient way of understanding a testcross problem in genetics?
A: In genetics, test cross is the breeding of an individual with a phenotypically recessive individual,…
Q: A geneticist determines that the order of four genes on a specific chromosome is CABD because the…
A: A physical map is used to find the exact distance between the genes on a chromosome and it is…
Q: In your own words, explain why a testcross cannot produce more than 50% recombinant offspring. When…
A: The external appearance of an individual for any trait is called phenotype for that trait. For…
Q: Is it possible to cross two different pure-breeding yellow zucchini strains and obtain all green…
A: Genetics is a branch of the biology involved in the study of genes, genetic variation, and heredity…
Q: what is the approximate map distance between the two genes?
A: Linkage is a phenomenon which determines how genes are placed in close proximity to each other. It…
Q: What is the recombination frequency?
A: Escherichia coli B is known to be the permissive strain for rII mutants since they permit the growth…
Q: a phenotype aB from an Aabb x aaBb cross? an ab gamete from an aaBB individual?
A: A trait is a characteristic feature that is unique to particular individual. In dihybrid cross , two…
Q: what is Unequal crossing-over between duplications ?
A: Crossing over is the process during which the non-sister chromatids of a homologous pair of…
Q: What is family pedigree studies ?
A: Family assessment tools are the tools used to gather information about an individual and their…
Q: What do we mean when we say a strain is true-breeding?
A: A type of strain in which the parents with a particular phenotype produces progenies only with the…
Q: In the diagram below A and B represent XX Ж A a b b в в Recombinants A A a a b b Select an answer…
A: Introduction The exchange of genetic material between two homologous chromosomes' non-sister…
Q: When true-breeding mice with brown fur and short tails (BBtt) were crossed to true-breeding mice…
A: This are multiple choice questions.
Q: How to build a genetic map? What is necessary? How does it relate to the physical distance? i. If I…
A: Genetic map is a physical representation of the order of genes in a chromosome. It represents the…
Q: To build a genetic map, how many types of crosses will be required to perform if you have three…
A: A genetic map is based on the concept of genetic linkage: the closer two markers are on a…
Q: Why would a researcher be interested in over- or misexpression phenotypes?
A: Examples of phenotypes include height, wing length, and hair color. Gene expression is the most…
Q: Can you explain genetic map with two point cross? And show me a example with the cross
A: Genetic map use to create by using information obtain through series of test cross. A cross between…
Q: A cross between two heterozygous individuals in one gene resulted in one phenotype, explain?
A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…
Q: Explain the difference between the terms 'penetrance' and 'expressivity' and explain which term is…
A: Penetrance and expressivity have been defined through clinical experience. Although penetrance is…
Q: In 1-2 sentences and in your own words, define the term recombination
A: Recombination in biology is an important word. It is required for creating variations in the gene.
Q: What are two possible explanations for why the same genotype (DNA) can result in different…
A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…
Q: What do you call the two new allele combinations generated from the cross over? A. linker B.…
A: Meiosis is defined as a type of cell division where a single cell undergoes cell division twice and…
Q: If you have a dihybrid organism with genotype AaBb whose alleles are in repulsion (trans)…
A: Trans configuration meaning: In genetics,two types of configurations are found-cis and trans Trans…
Q: Would you be able to draw a circular map of the seven genes? I have trouble with correct position of…
A: The DNA replicates itself several times during the replication process. It is a biological…
Q: What genetic model of an organism is the most ideal? And why is it an ideal model in genetics?
A: Genetics is a scientific study that deals with heredity and variation of the inherited…
Q: Can you explain a genetic map with the three point testcross
A: A genetic map is a special kind of chromosome map that depicts the relative positions of genes and…
Q: So why the barr bodies cannot be seen in the experiment?
A: Each organism's DNA sequence is unique. Its base-pair sequence might vary from time to time. It is…
Q: What is difference between normal primer and degenerative primer
A: Primer: These should be 18–24 nucleotides in the length and it provides for the practical annealing…
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- After Griffith injected the mouse with a heat-killed S strain and the live R strain, blood from the mouse contained live S strain. True or False?Eight mutant bacteriophage strains cannot lyse a certain type of bacteria that can be lysed by wild-type bacteriophages. The mutant strains were allowed to infect the bacteria in a complementation test. A "+" indicates that lysis occurred with coinfection. A "-" indicates that lysis did not occur. OXWTMAO G K Т Т М А А Q C GKWTMAQC +++++ - - - - - - - + - + - + - - + - - - O +++ - + - - + + A cistron is defined by no complementation in the How many genes are controlling lysis in this bacteriophage? (Use a number not a word in the space) configuration.In your laboratory, you have an F − strain of E. coli that is resistant to streptomycin and is unable to metabolize lactose, but it can metabolize glucose. Therefore, this strain can grow on media that contain glucose and streptomycin, but it cannot grow on media containing only lactose. A researcher has sent you two E. coli strains in two separate tubes. One strain, let’s call it strain A, has an F factor that carries the genes that are required for lactose metabolism. On its chromosome, it also has the genes that are required for glucose metabolism. However, it is sensitive to streptomycin. This strain can grow on media containing lactose or glucose, but it cannot grow if streptomycin is added to the media. The second strain, let’s call it strain B, is an F − strain. On its chromosome, it has thegenes that are required for lactose and glucose metabolism. StrainB is also sensitive to streptomycin. Unfortunately, when strains A and B were sent to you, the labels had fallen off the…
- BACTERIA STRAIN A IS AUXOTROPHIC FOR METHIONINE AND STRAIN B IS AUXOTROPHIC FOR LEUCINE. A. WILL THESE STRAIN GROW ON MINIMAL MEDIUM (A MEDIUM THAT DOES NOT CONTAIN EITHER METHIONINE OR LEUCINE)? B. WHAT TYPE OF GENETIC RECOMBINATION MUST OCCUR TO RECOVER A PROTOTROPH?Why do strains #3 and #5 in the table below have different phenotypes?DNA from a strain with genotype a+b+c+d+ is used to transform a strain with a genotype a-b-c-d-. Pair of genes are checked for cotransformation and the data was collected. Pair of genes Cotransformation Pair of genes Cotransformation a+b+ Yes c+e+ Yes b+c+ No d+e+ No a+e+ Yes b+e+ No d+c+ Yes b+d+ No d+a+ No a+c+ No Using the data in #7, determine which locus is closest to a. c e b can’t determine from the data What are the methods of genetic material transfer in bacteria? Transformation Transduction Conjugation None of these All of these Along with mutation, which of the following is another way that bacteria acquire antibiotic resistance through horizontal gene transfer? Transformation Transduction Conjugation None of these All of these
- The recombination process below occurs when two recombination occurs between two different alleles, but only only one of the alleles is perpetuated in the final product. This process is called [x]?clones produced from the same organism are found to exhibit slightly different physical traits. what is most likely reason for thisYou've crossed two strains: (Hfr) pro+ lac+ arg+ with (F-) pro- lac- arg- . Interrupted mating studies indicated that arg+ enters the cell last, so you want to select for arg+ recombinants in order to map the genes by recombination. Which type of plates will you use for your initial selection? Containing proline, lactose, and arginine. Containing proline, glucose, and arginine. Containing arginine and glucose. Containing lactose and proline. Containing glucose and proline. Minimal media with nothing added.
- DNA obtalned from the indicated donor strains is used to TRANSFORM the indicated recipient strains. The resulting progeny are plated on minimal medium so that only wild- type recombinants are scored. The number of wild-types for each cross is given in the chart below. What is the order of the genes? Donor Recipient wid type colonies a-b- c+ a+ b+ c- 273 a- b+ c- a+ b-c+ 462 a- b+ C+ a+ b-c- 2 a b- C+ a- b+ c+ O 4-b-c a-o-b b-a-c cannot be determined Question 18 of 26A yeast geneticist irradiates haploid cells of a strain thatis an adenine-requiring auxotrophic mutant, caused bymutation of the gene ade1. Millions of the irradiatedcells are plated on minimal medium, and a small number of cells divide and produce prototrophic colonies.These colonies are crossed individually with a wildtype strain. Two types of results are obtained:(1) prototroph × wild type : progeny all prototrophic(2) prototroph × wild type : progeny 75% prototrophic,25% adenine-requiring auxotrophsa. Explain the difference between these two types ofresults.b. Write the genotypes of the prototrophs in each case.c. What progeny phenotypes and ratios do you predictfrom crossing a prototroph of type 2 by the original ade1auxotroph?You are asked to determine the recombination frequencies of a number of loci. Your work reveals that the recombination frequency is larger the further the loci are from each other. Why is this?