Q: A geneticist examines an ear of corn in which most kernels are yellow, but he finds a few kernels…
A: The anthocyanin pigment produced by corn is responsible for its peculiar purple colour. This happens…
Q: In a species of rat, the map unit distance between genes A, B, C and D were as follows: (in the…
A: There are 4 genes : A , B , C , D in the species of rat. Basically , Map unit or m.u or cM is the…
Q: A yeast geneticist irradiates haploid cells of a strain that is an adenine-requiring auxotrophic…
A: A mutant strain that isn't able to grow on a minimal medium and requires some specific supplements…
Q: A condition known as icthyosis hystrix gravior appeared in a boy in the early eighteenth century.…
A: It passes from father to son and not from father to daughter.
Q: In McCune-Albright syndrome, fibrous connective tissue replaces bone, tan patches (café-au-lait…
A: A mutation is considered a change in the DNA sequence, which can be either an addition or deletion…
Q: Consider two maize plants:a. Genotype C/c m ; Ac/Ac+, where cm is an unstable allele caused by a Ds…
A: Ac and C are unlinked, that the chromosome-breakage frequencyis negligible, and that mutant c /C is…
Q: Three autosomal recessive mutations in yeast, all producing the same phenotype (m1, m2, and m3), are…
A: An autosomal recessive mutation means two copies of an abnormal and defective gene must be present…
Q: What is a heterochronic mutation? How does it affect the phenotypic outcome of an organism? What…
A: Mutation means sudden changes occur in DNA sequences. The mutation occurs randomly. It also occurs…
Q: “In an organism that reproduces asexually, there is no difference between a somatic cell mutation…
A: Somatic mutations These refers to the mutations in a single body cell, which cannot be inherited.…
Q: Genes a, b, and c are linked, and pairwise crosses gave the following distances: a-b 20 cM b-c 2 cM…
A: Note - Since you have asked multiple questions, we will solve the first question for you. If you…
Q: What is the most likely order of the linked genes R, S, and T if the distance between R and S is 22…
A: The above scenario based on linkage and maping.
Q: What is the relationship between linked genes and syntenic genes? Are syntenic genes always linked?…
A: Introduction Linkage is the phenomenon in which genes are situated on the same chromosome (linked…
Q: . Imagine that you have done a cross between twostrains of yeast, one of which has the genotype A B…
A: A genetic cross is defined as deliberately mating two individuals to create a desired genotype in…
Q: In Neurospora, a mutant strain called stopper (stp) arose spontaneously. Stopper showed erratic…
A: The genes are the hereditary unit of an organism which are passed on from the parental generation to…
Q: cross between a wild-type fruit fly strain and various true-breeding mutant strains (all at a single…
A: Hi dear, here's your answer what you want.can you please give me a like for this answer. Hypomorph…
Q: Suppose that you wished to determine the number of pseudogenes related to a particular gene in an…
A: There will some steps which you should follow.
Q: Map distances were determined for four differentgenes (MAT, HIS4, THR4, and LEU2) on chromosome III…
A: Chromosomes are long thread like structures that carry coded genetic information in the form of…
Q: Suppose, you want to detect the CAG repeat expansion within a particular gene (30 repeats in normal…
A: Hi! Thank you for the questions. As you have posted multiple questions, I will be answering the…
Q: A yeast geneticist irradiates haploid cells of a strain thatis an adenine-requiring auxotrophic…
A: A mutant strain that isn't able to grow on a minimal medium and requires some specific supplements…
Q: Wild-type strains of the haploid fungus Neurospora canmake their own tryptophan. An abnormal allele…
A: Autotrophic strains are those which does not require the aminoacid as it has genes which are able to…
Q: Based on your knowledge of genetics, how would you determine whether kanamycin or BASTA-resistant T2…
A: Kanamycin A, often known as kanamycin, is an antibiotic used to treat tuberculosis and severe…
Q: To understand the genetic basis of locomotion in the diploid nematode Caenorhabditis elegans,…
A: Introduction Genetics is a branch of biology that studies genes, genetic diversity, and heredity in…
Q: Starting with a population of genetically identical mice, you discover two new independent mutant…
A: The correct option is C i.e, the same gene, but not necessarily the same DNA base position.…
Q: Why have we chosen a human Rab protein with no direct yeast equivalent as an “outgroup” for this…
A: Rab protein: it plays important role in recruitment of organelle specific vesicles tethering…
Q: Here are the results of the testcross: Green-eyes, wild-type wings 245 Green-eyes, miniature wings…
A: 6) The number of flies with green eyes and and miniature wings are 232, these organisms are least in…
Q: Gene A, which encodes alcohol dehydrogenase, is labeled with a red fluorophore in a FISH experiment…
A: Introduction :- FISH( fluorosecent in situ hybridization ) is a technique in which a DNA probe ,…
Q: In Neurospora, the mutant stp exhibits erratic stop-andstart growth. The mutant site is known to be…
A: mtDNA stands for mitochondrial DNA. If an stp strain is used as the female parent in a cross with a…
Q: Inversions are known to affect crossing-over. The following homologs have the indicated order (the…
A: Thank you for the question. Answer : inversion is when there is disruption of a single chromosome (…
Q: Six pure-breeding strains for eye color mutations in Drosophila are developed and crossed. Red is…
A: The "mutation" alters allele frequencies by constantly introducing new alleles, which can be…
Q: The locations of six deletions have been mapped to a Drosophila chromosome, as shown in the…
A: Mutation is an abrupt change in the DNA sequence and nucleotide base pairs. Mutation is caused by…
Q: Two different strains of Drosophila melanogaster are mated in reciprocal crosses. When strain A…
A: Transposable elements are DNA sequences that are able to change their position in a genome sequence.…
Q: what is the general definition of gene drive and how does it differ from a gene expression pattern…
A: Gene drives can arise through a variety of mechanisms. They have been proposed to provide an…
Q: The locations of six deletions have been mapped to a Drosophila chromosome, as shown in the…
A: we have a set of overlapping deletions which is to be used to put in order a set of mutants. this is…
Q: Species A has 2n=18 and Species B has 2n=14. How many chromosomes would be found in each of the…
A: This question consists of 5 sub parts which as per the rules of Bartleby.com only first 3 sub parts…
Q: The recombination frequency between purple color and large wings in Drosophila is 10%. What can we…
A: To answer this question you should understand linkage and recombination.If two genes are located on…
Q: What is the “-10” position of the gene called? Why?
A: DNA is two stranded , ladder like structure which act as genetic material in most of organisms . It…
Q: How would you know exactly where in the genome this locus Is found?
A: Genome is the genetic material of an organism, which consists of deoxyribonucleic acid (DNA). It…
Q: In the lab, you discover two yeast haploid mutants that cannot produce arginine. You cross them…
A: The mutation causes a change in the DNA and it alters the type of protein that they codes and the…
Q: How did the discovery of three categories of petite mutations in yeast lead researchers to postulate…
A: Extranuclear inheritance is defined as the transmission of genes that happen outside the nucleus. It…
Q: How do the egl-1 and pos-1 phenotypes interact? Do you think this is a meaningful genetic…
A: Caenorhabditis elegans, a nematode is a useful genetic model to study RNA interference technique…
Q: his-1 and lys-3 are alleles found in baker's yeast that require histidine and lysine for growth,…
A: In its most basic form, genetic transformation is the change of a cell caused by the introduction of…
Q: What is the relationship between the C and T allele of position -13910? Is one allele dominant over…
A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: One yeast strain carries the alleles lys+ and arg+, whereas another strain has lys-3 and arg-2. The…
A: Ascus is a structure containing spores produced in fungi after reproduction and in favourable…
Q: Why is a human Rab protein with no direct yeast equivalent chosen as an “outgroup” for a study?
A: Rab proteins →Ras-associated binding proteins are part of the Ras superfamily that are involved in…
Q: For a haploid fungus, the starting point in the biosynthesis of the amino acid arginine is Compound…
A: Introduction :- Haploid fungus consists of single set of chromosomes . They synthesize amino acid…
Q: Neurospora of genotype a + c are crossed withNeurospora of genotype + b +. (Here, + is shorthandfor…
A: Hi there! Since you have posted multiple questions, we are answering only the first two sub-parts…
A yeast strain with a mutant spo11- allele has been isolated. The mutant allele is nonfunctional; it makes no spo11 protein. What do you suppose is the
the phenotype of this mutant strain is haploid, loss of mutations are Recessive
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- Baker's yeast, Saccharomyces cerevisiae, is a single-celled, diploid fungus (which is, of course, a eukaryote, that is capable of both meiosis and sexual reproduction). Wild type yeast can normally grow on solid or liquid minimal medium; you isolate three mutant strains which are no longer capable of growing on minimal medium alone, however, they can grow on medium supplemented with adenine. All three yeast strains are homozygous for the underlying alleles. When you cross mutant strain 1 and mutant strain 2, the offspring cannot grow on minimal medium alone and require adenine supplementation; when you cross mutant strain 1 and mutant strain 3, the offspring can grow on minimal medium alone and do not require adenine. After crossing the F1 generation of the cross between mutant strains 1 and 3, you count and determine the phenotypes of 1,000 colonies (here a colony is equivalent to an individual): 563 colonies that can grow on minimal medium alone; 437 colonies that require adenine…Baker's yeast, Saccharomyces cerevisiae, is a single-celled, diploid fungus (which is, of course, a eukaryote, that is capable of both meiosis and sexual reproduction). Wild type yeast can normally grow on solid or liquid minimal medium; you isolate three mutant strains which are no longer capable of growing on minimal medium alone, however, they can grow on medium supplemented with adenine. All three yeast strains are homozygous for the underlying alleles. When you cross mutant strain 1 and mutant strain 2, the offspring cannot grow on minimal medium alone and require adenine supplementation; when you cross mutant strain 1 and mutant strain 3, the offspring can grow on minimal medium alone and do not require adenine. A. What conclusions can you make about the alleles of mutant strains 1, 2, and 3 and their relationships with each other? B. What phenomenon is occurring in the cross between mutant strains 1 and 3? After crossing the F1 generation of the cross between mutant strains 1…Baker's yeast, Saccharomyces cerevisiae, is a single-celled, diploid fungus (which is, of course, a eukaryote, that is capable of both meiosis and sexual reproduction). Wild type yeast can normally grow on solid or liquid minimal medium; you isolate three mutant strains which are no longer capable of growing on minimal medium alone, however, they can grow on medium supplemented with adenine. All three yeast strains are homozygous for the underlying alleles. When you cross mutant strain 1 and mutant strain 2, the offspring cannot grow on minimal medium alone and require adenine supplementation; when you cross mutant strain 1 and mutant strain 3, the offspring can grow on minimal medium alone and do not require adenine. A. What conclusions can you make about the alleles of mutant strains 1, 2, and 3 and their relationships with each other? B. What phenomenon is occurring in the cross between mutant strains 1 and 3?
- A 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?For a haploid fungus, the starting point in the biosynthesis of the amino acid arginine is Compound X, which is always present in and absorbed from the environment. The arginine biosynthetic pathway is: Enzyme A Enzyme B Enzyme Ç Compound X It is know that genes encoding enzymes A and C are on two different chromosomes. Compound Y Compound Z- Arginine A mutant strain of genotype a (lacking only enzyme A) is crossed to a mutant strain of genotype c (lacking only enzyme C) to generate a diploid strain. Sporulation (i.e. meiosis) is subsequently induced in the resulting diploid strain. What proportion of the spores (haploids formed by sporulation) is expected to grow on medium without arginine but supplemented with Compound Y? O 100% 50% 0% 25%Wild-type strains of the haploid fungus Neurospora canmake their own tryptophan. An abnormal allele td renders the fungus incapable of making its own tryptophan.An individual of genotype td grows only when its medium supplies tryptophan. The allele su assorts independently of td; its only known effect is to suppress the tdphenotype. Therefore, strains carrying both td and su donot require tryptophan for growth.a. If a td ; su strain is crossed with a genotypically wildtype strain, what genotypes are expected in the progenyand in what proportions?b. What will be the ratio of tryptophan-dependent totryptophan-independent progeny in the cross of part a?
- A yeast geneticist irradiates haploid cells of a strain that is an adenine-requiring auxotrophic mutant, caused by mutation of the gene ade1. Millions of the irradiated cells 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 of results.b. Write the genotypes of the prototrophs in each case.c. What progeny phenotypes and ratios do you predict from crossing a prototroph of type 2 by the original ade1auxotroph?Why have we chosen a human Rab protein with no direct yeast equivalent as an “outgroup” for this study (image given)?Three haploid fungal mutants that require compound W for growth were isolated. Each mutant contains a recessive allele in a single gene. Three compounds (A, B and C) in the biosynthetic pathway to W are known, but their order in the pathway is unknown. Each compound is tested for its ability to support the growth of each of the three mutants. Phenotypes of all of the three mutants are shown in the following table (“+" indicates growth, "-" indicates no growth). A C W Mutant 1 Mutant 2 Mutant 3 What would be the phenotype of a haploid mutant that contains both mutant alleles in mutant 2 and 3? Phenotype refers to growth or absence of growth on compounds A, B, C and WN. O Like mutant 1 O Like mutant 2 Like mutant 3 O Like wild type
- You have identified five genes in S. cerevisiae that are induced when the yeast are grown in a high-salt (NaCl) medium. To study the potential roles of these genes in acclimation to the growth in high-salt conditions, you wish to examine the phenotypes of loss- and gain-of-function alleles of each. How will you do this?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…You cross two yeast strains one is an ade auxotroph the other is a pro auxotroph and allow the diploid to sporulate. When you score each spore in the ascus you find the following proportions: 518 PD, 8 NPD, and 225 T. a.) What are the genotypes of each spore in all three types of the tetrads. b) Are these genes linked why or why not? c.) If these genes are unlinked what would you expect the progeny numbers and ratios to be? d.) What is the formula to determine the most accurate distance between these genes? If linked what is the map distance?