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: If 2 spot (S) is dominant to 4 spot (s), give the genotypes for the parents in the following…
A: Different versions of a gene are called alleles. Alleles are described as either dominant or…
Q: is image How many different phenotypic categories do you observe in the resulting progeny? Which…
A: Phenotype is the external appearance of an organism.
Q: In sweet peas, gene C or P alone produces white flowers, the purple colour being due to the presence…
A: Dominance is a physiological influence on the same gene locus by an allele over its partner allele.…
Q: In a cross of a h-r+ X h+r-, the following progeny were produced: 25 h-r+ 23 h+r- 7 h+r+ 5 h-r-…
A: The genetic distance between two genes is calculated by : (recombinant progenies/ Total number of…
Q: A cross between fruit files with genotypes Aa Bb × aa bb produces the following progeny: 10 Aa Bb…
A: Linkage is a phenomenon in which how genes are placed in close proximity to each other but in the…
Q: In a test cross, peas of an unknown genotype are crossed with peas of a known genotype. In this…
A: Test cross is a cross between organisms of an unknown genotype and a recessive parent. It is a…
Q: E. W. Lindstrom crossed two corn plants with green seedlings and obtained the following progeny:…
A: Two corn plants with green seedlings were crossed and the offspring obtained are green seedling is…
Q: For a given cross, the expected number of double recombinants is 18 and the observed number of…
A: The measure of genetic linkage is termed as recombination frequency, which is used in the…
Q: What is the maximum possible number of doses of pigmentation for a given plant? . How many color…
A: There are few points: Traits are classified into phenotypic character Number of gene pairs that are…
Q: What does the symbol arg-1 mean? How would you test for this genotype?
A: The names of the gene must be informative as well as concise. Every gene name should be exclusive…
Q: What will be the phenotypic ratio for a heterozygous cross between Pp and Pp?
A: An allele is a variant form of a given gene. Phenotype is the observed physical traits of an…
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: How can a phenotype be purple and brown, for example, at the same time?
A: A character which is distinguish physical is said to be phenotypic character
Q: n a fox ranch in Scandinavia, a mutation arose that yielded a “platinum” coat color. The platinum…
A: A breeders are not able to produce a pure- breeding platinum foxes even when they tried to cross two…
Q: In a two factor cross, the longest possible map distance is 50 map units. Explain why this is…
A: By finding the recombination frequencies of many gene pairs, we can make genetic or linkage maps. By…
Q: E. W. Lindstrom crossed two corn plants with green seedlings and obtained the following progeny:…
A: Two corn plants with green seedlings were crossed and the offspring obtained are green seedling is…
Q: How can the product rule be used to predict the results of crosses in which multiple genes are…
A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…
Q: Let’s suppose gene A and gene B are closely linked to each other. An AaBb individual (with the…
A: Given, gene A and gene b are linked closely to each other. An individual with genotype AaBb is…
Q: What is the inheritance pattern shown in the following pedigree?
A: Gregor Mendel performed his famous experiment by crossing pea plants to prove that the traits of the…
Q: What are the expected progeny (genotypes and phenotypes) from a cross of an AA plant with an Aa…
A: A cross is made to predict the traits of the progeny related to the parents. In a monohybrid cross,…
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: in a test cross involving two genes a purple color were crossed to a white color plants. the…
A: As phenotypic ratio pertains to the relative variety of offspring manifesting a selected attribute…
Q: If a pure-breeding purple-flowered pea plant is crossed with a pure-breeding white-flowered pea…
A: He discovered that traits/ characters are inherited as discrete factors which were later known as…
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…
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A: Diseases have been researched extensively in the recent times. It is observed that diseases are not…
Q: Would it be possible to deduce the law of independent assortment from monohybrid crosses? Why or why…
A: During the dihybrid cross, when each pair of characters is independent of each other, it is referred…
Q: In the self of a polygenic trihybrid R1/r1 ; R2/r2 ; R3/r3,use the product and sum rules to…
A: When a self cross takes place between the polygenic hybrid, then: The probability in which only one…
Q: The pedigree chart below indicates that individual I12 has cystic fibrosis. What is the chance that…
A: Cystic Fibrosis is an inheritable chronic disorder, that affects the cells that secrete mucus,…
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: If you had a fruit fly (Drosophila melanogaster) that wasof phenotype A, what cross would you make…
A: The working segment of DNA that mainly codes for proteins is a gene. Genetics is the study of genes.…
Q: What is the predicted phenotypic outcome of a dihybrid cross and a dihybrid text cross? Why?
A: Let a round yellow pea be dominant and wrinkled green pea be recessive.
Q: Explain the Limitations of two-point crosses
A: Answer: Introduction: A two-point test-cross is performed to estimate the recombinant frequency…
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: A particular walnut rooster was crossed to a pea hen, and the progeny consisted of 12 walnut, 11…
A: The genetics of the comb-type of chicken is controlled by two different genes. These genes are…
Q: The A locus and the D locus are so tightly linked that norecombination is ever observed between…
A: Introduction Genes can be linked or autonomous. When they segregate during the time of formation,…
Q: In a three-point testcross, the nonrecombinant progeny are A+ B+ C+ and a b c. The double- crossover…
A: "Genes" are the fundamental unit of heredity. They store genetic information in the form of DNA,…
Q: letter B: If the map distance equals the number of recombinant/total of offspring, wouldn't it be…
A: Gene distance The distance between two different gene located on the same chromosomes.
Q: In the case of carnation flower, what do you think a flower carnation would look like if the red and…
A: Incomplete dominance: In this type of inheritance, a third phenotype is produced and this will be a…
Q: In roses, two pathways combine to produce orange colored flowers in wild type. Two heterozygous…
A: The genes control the hereditary characters of an organism. The genes may be transferred via…
Q: n a cross of EeFfGgHh and EEFfGGhh individuals, what is the probability that an EEffGGhh individual…
A: Punnett squares make very easy tools for studying the traits of parental generation and working out…
Q: Why are some crosses not performed in a complementation matrix?
A: Complementation is the capacity of 2 mutants in combination to reinstate the normal phenotype. The…
Q: Why is it more efficient to perform a test cross with a homozygous recessive donor than a homozygous…
A: The set of alleles for a given trait in an organism is called genotype, while the observable traits…
Q: Since experimental crosses are not performed in humans, how do we know how traits are inherited?
A: Genetic traits are regulated by genes.
Q: If a plant with yellow, wrinkled seeds was crossed with a plant with gr seeds, which of the…
A: rr is showing the allele for the wrinkled. RR is showing the allele for the round. YY is for the…
Q: The genotypes of F1 individuals in a trihybrid cross are LlMMNn x llMmNn. What is the probability…
A: To find: The probability that the F2 offspring with an LlMmnn genotype
In mice, there is a yellow strain that when crossed yields 2 yellow:1 black. How could you explain this observation?
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- Individuals of genotype AaBb were mated to individuals of genotype aabb. One thousand offspring were counted, with the following results: 474 Aabb, 480 aaBb, 20 AaBb, and 26 aabb. What type of cross is it? Are these loci linked? What are the two parental classes and the two recombinant classes of offspring? What is the percentage of recombination between these two loci? How many map units apart are they?You perform a cross between a parent with the genotype WWiiNNttEErr and another parent that is wwllnnTTeerr. All genes are unlinked except for W and I which are 22 mu apart. You take an F1 from this cross and cross it with an individual that is wwiiNntteerr. a) What is the probability that this final cross yields an offspring that is wwiinntteerr? b) What is the probability that this final cross yields an offspring that is NNTT or Nntt. (You can ignore all of the other genes for this question.)The genotypes of F1 individuals in a trihybrid cross are LlMMNn x llMmNn. What is the probability that the F2 offspring will have an LlMmnn genotype? Use the forked-line method in solving the problem.
- In a variety of tomato plant ,the leaves maybe pure green,pure white,or variegated (mixture). a)when 2 variegated plants were crossed,87 offspring were produced,of these 20 were green,46 were variegated and 21 remain died soon after germination.Draw a genetic diagram to explain these results,why did 21 of them diedTwo pure-breeding lines of petunia plants are crossed. Line 1 plants grow to a height of 54 cm, and Line 2 plants grow to a height of 18 cm. Petunia plant height is controlled by three genes, A, B and C. Line 1 has the genotype A₁A₁B₁B₁C₁C₁, and line 2 has the genotype A2A2B₂B₂C₂C₂. Assume that genotype alone determines plant height under ideal growth conditions and that the alleles of the three genes are additive. If the F1 plants are self crossed, what is the expected proportion of F2 plants with the genotype A₁A₁B₁B₁C₁C₁ 1/8 1/32 1/16 1/4 1/64In this test cross of AaBbCc you got these results: 100 АВС 100 abc 100 ABC 100 abC 25Abc 25ABC 25 аBС 25 аВс a) Which two genes are linked? Show or explain how you know. b) How far apart are those genes?
- How can the product rule be used to predict the results of crosses in which multiple genes are studied simultaneously?In autotetraploid Chinese primrose (Primula sinensis L.), the gene controlling stigma color is very near the centromere of the chromosome carrying it. The allele G for green stigma is dominant to g for red stigmas. A homozygous green autotetraploid strain is crossed with a homozygous red autotetraploid strain. Each of the F1 GGgg plants would obtain 12 gametes which are 2GG, 8Gg, and 2g. How were these obtained?A Neurospora colony at the edge of a plate seemed to be sparse (low density) in comparison with the other colonies on the plate. This colony was thought to be a possible mutant, and so it was removed and crossed with a wild type of the opposite mating type. From this cross, 100 ascospore progeny were obtained. None of the colonies from these ascospores was sparse, all appearing to be normal. What is the simplest explanation of this result? How would you test your explanation? (Note: Neurospora is haploid.)
- Three autosomal recessive mutations in yeast, all producing the same phenotype (m1, m2, and m3), are subjected to complementation analysis. Of the results shown below, which, if any, are alleles of one another? Predict the results of the cross that is not shown—that is, m2 * m3. Cross 1: m1 * m24 F1: all wild-type progeny Cross 2: m1 * m34 F1: all mutant progenyIn sweet peas, gene C or P alone produces white flowers, the purple colour being due to the presence of both these factors. What will be the flower colour of the offsprings of the following crosses, in which genotypes of parents are given;a) A white flowered plant crossed with a purple produces offspring, of which three-eighth are purple and five-eighth white.Nicotiana glutinosa (2 n = 24) and N. tabacum (2 n = 48) are two closely related plants that can be intercrossed, but the F1 hybrid plants that result are usually sterile. In 1925, Roy Clausen and Thomas Goodspeed crossed N. glutinosa and N. tabacum and obtained one fertile F1 plant . They were able to self-pollinate the flowers of this plant to produce an F2 generation. Surprisingly, the F2 plants were fully fertile and produced viable seeds. When Clausen and Goodspeed examined the chromosomes of the F2 plants, they observed 36 pairs of chromosomes in metaphase I and 36 individual chromosomes in metaphase II. Explain the origin of the F2 plants obtained by Clausen and Goodspeed and the numbers of chromosomes observed.