Suppose a design problem was coded with 5 genes on a single chromosome, and single-point crossover was used. During the crossover between two parents, how many different children (in terms of genotype) could be produced?
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Q: Crossover occurs during what phase? What is this process and why is it important?
A: ANSWER;- Crossing over occurs during prophase I of meiosis before quadruplicates are aligned along…
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Q: How can I Explain with diagram how mitotic crossover (recombination) lead to cancer.
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Q: How linkage and crossing over is inter-related explain with suitable examples.
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Q: Consider Cyclic Crossover on two Parent chromosomes: Parent1 = A0846172593B and Parent2 =…
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A: Given, gene A and gene b are linked closely to each other. An individual with genotype AaBb is…
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: SET 2: In corn, the following allelic pairs have been identified in chromosome 3: +/b > plant color…
A: Genes forms the hereditary units of life. The genes can have alternative forms called as alleles.…
Q: In certain instances crossing over between two linked genes can be suppressed. How would crossover…
A: Crossing over occurs between the non sister chromatids of homologous chromosome during the prophase…
Q: Crossing-over is all of the following EXCEPT
A: The exchange of genetic material between non-sister chromatids of homologous chromosomes is called…
Q: how would the phenomenon ofcrossing over affect the results? In other words, would the probability…
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Q: How linkage and crossing over is inter related explain with suitable example
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Q: For a certain chromosomal region, the mean number ofcrossovers at meiosis is calculated to be two…
A: For a certain chromosomal region, the mean number ofcrossovers at meiosis is calculated to be two…
Q: How many different kind of gametes could each of the parents produced?
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A: Answer: The correct option is: Statement 1 and Statement 2 are both FALSE.
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Q: SET 2: In corn, the following allelic pairs have been identified in chromosome 3: +/b plant color…
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Q: Explain how human cells compensate for the X-linkedgene dosage difference in XX and XY nuclei.
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Q: The following testcross produces the progeny shown: Aa Bb × aa bb → 10 Aa Bb, 40 Aa bb, 40 aa Bb, 10…
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A: Inheritance or heredity is passing-on one trait from the parents to the progeny by either asexual or…
Q: SET 2: In corn, the following allelic pairs have been identified in chromosome 3: +/b plant color…
A: Genes form the hereditary units of life. Genes can have alternative forms called alleles. When two…
Q: Which two genotypes are from flies when a double crossover occurred?
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- Suppose crossover occurs between the homologous chromosomes in the previous problem. At what stage of M phase do alleles D and d segregate?In the experiment of Figure shown, Stern followed the inheritancepattern in which females carried two abnormal X chromosomesto correlate genetic recombination with the physical exchange ofchromosome pieces. Is it necessary to use a strain carrying twoabnormal chromosomes, or could he have used a strain in whichfemales carried one normal X chromosome and one abnormal Xchromosome with a deletion at one end and an extra piece of the Ychromosome at the other end?Suppose a student performs a three-point test cross with mice involving mouse genes T, V and D. If the most abundant classes of progeny are TvD and tVd and the rarest classes are tvd and TVD which gene is in the middle and what is the genotype of each mouse involved in the cross?
- What is the cross between the progeny of F1 and the homozygous reccessive parent called? How is it usefull?SET 2: In corn, the following allelic pairs have been identified in chromosome 3: +/b plant color booster vs. non-booster +/lg with ligule vs. without ligule +/v green plant vs. virescent A test cross between triple recessive plants and plants heterozygous for the three pairs gave the following progeny: + v lg 305 b + lg b v lg + + lg b v + 148 58 + + + 62 + y + 152 b + + 275 Total 1000 Calculate the parental and recombinant frequencies, the map distances between genes, and the coefficient of coincidence. Illustrate the gene map or sequence.A crossover has occurred in the bivalent shown in figure.What is the outcome of this single crossover event? If a secondcrossover occurs somewhere between A and C, explain which twochromatids it would involve and where it would occur (i.e., betweenwhich two genes) to produce the chromosomes shown here:A. ABC, AbC, aBc, and abcB. Abc, Abc, aBC, and aBCC. ABc, Abc, aBC, and abCD. ABC, ABC, abc, and abc
- SET 2: In corn, the following allelic pairs have been identified in chromosome 3: +/b > plant color booster vs. non-booster +lg → with ligule vs. without ligule +/v > green plant vs. virescent A test cross between triple recessive plants and plants heterozygous for the three pairs gave the following progeny: + v lg b + lg b v lg 305 148 58 + + lg b v + + + + 62 + v + 152 b + + 275 Total 1000 Calculate the parental and recombinant frequencies, the map distances between genes, and the coefficient of coincidence. Illustrate the gene map or sequence.SET 2: In corn, the following allelic pairs have been identified in chromosome 3: +/b plant color booster vs. non-booster +/lg with ligule vs. without ligule +/v green plant vs. virescent A test cross between triple recessive plants and plants heterozygous for the three pairs gave the following progeny: + v lg b + lg b v lg + + lg 305 148 58 bv + + + + 62 + v + b + + 152 275 1000 Total Calculate the parental and recombinant frequencies, the map distances between genes, and the coefficient of coincidence. Illustrate the gene map or sequence.n corn, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the male part of the corn plants (i.e the tassel) unable to produce fertile pollen; the female parts, however, remain receptive to pollination by pollen from male fertile corn plants. However, the presence of a nuclear fertility restorer gene F restores fertility to male sterile lines sing the cardboard chips, simulate the crosses indicated below. Give the genotypes and phenotypes of the offsprings in each cross, and properly label the nucleus and the cytoplasm of each individual in the cross Legend male sterile cytoplasm Male fertile cytoplasm FF nucleus Ff nucleus ff nucleus A. Male sterile female x FF male Explain the phenotype of the offspring B. Male sterile female x Ff male Explain the phenotype of the offspring
- When Thomas Hunt Morgan crossed his red-eyed F1 generation flies to each other, the F2 generation includedboth red- and white-eyed flies. Remarkably, all the white-eyed flies were male. What was the explanation forthis result? a. The gene involved is on the X chromosomeb. The gene involved is on the Y chromosomec. The gene involved is on an autosome, but only in malesd. Other male-specific factors influence eye color in fruit fliese. None of these is correctSuppose you have a line of mice that has cytologicallydistinct forms of chromosome 4. The tip of the chromosome can have a knob (called 4K) or a satellite (4S) orneither (4). Here are sketches of the three types:4K4S4You cross a 4K/4S female with a 4/4 male and find thatmost of the progeny are 4K/4 or 4S/4, as expected.However, you occasionally find some rare types asfollows (all other chromosomes are normal):a. 4K/4K/4b. 4K/4S/4c. 4KExplain the rare types that you have found. Give, asprecisely as possible, the stages at which they originate,and state whether they originate in the male parent,the female parent, or the zygote. (Give brief reasons.)Assume that a meiotic-nondisjunction event causes trisomy 8 in a newborn. If two of the three copies of chromosome 8 are absolutely identical, at what point during meiosis did the nondisjunction event take place?