Q: What is recombinant fraction and genetic distance and their major differences
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A: The mutation is any alteration that occurs in the nucleotide sequence due to impaired DNA copying,…
Q: A misaligned crossover between two homologous chromosomes usually results in:
A: Crossing over is the process of exchange of gene segments between the non sister chromatids of…
Q: In corn, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the…
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Q: When two plants belonging to the same genus but different species are crossed, the F1 hybrid is more…
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Q: We will see an MI pattern when: There is crossover between two centromeres There is crossing over…
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Q: You continue your experiments with the black mutation on chromosome II. You cross the reciprocal…
A: Introduction: The most advancing branch of science is genetics. The study of genetics comprises…
Q: How can I Explain with diagram how mitotic crossover (recombination) lead to cancer.
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Q: What phenomenon explains why the maximum percentage of recombinant offspring does not exceed 50%?
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Q: Which of the following can explain the observation that two pureline mutants both showing identical…
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Q: A crossover has occurred in the bivalent shown figure.If a second crossover occurs in the same…
A: Crossing over is the exchange of chromosome DNA segments between non-sister chromatids which takes…
Q: Consider three genes on the same chromosome, Gene A, Gene B and Gene C. You perform three factor…
A: As 3 genes are located on the same chromosome then the crossing over event is very rare.
Q: What does the interference tell us about the effect of one crossover on another?
A: Crossover is the phenomenon in which two homologous chromosomes, or instances of the same…
Q: Does a molecular marker have to be polymorphic to be useful in physical mapping studies? Does a…
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Q: Which of the following statement is TRUE? Recombinants cannot be formed without crossovers between…
A: Two genes characterizing two different traits of an organism are located on two different…
Q: If the G locus were 50 or more map units from the centromere, what types and proportions of gametes…
A: Recombination Recombination is an event in cell division(meiosis and mitosis) in which the exchange…
Q: A X cross, is conducted when an organism with the dominant phenotype and unknown genotype is crossed…
A: This is the test cross, where an organism with dominant phenotype but unknown genotype is crossed…
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Q: How to build a genetic map? What is necessary? How does it relate to the physical distance? i. If I…
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Q: The two forms of recombination are general and _____________.
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Q: Taking into consideration the following figure, which second crossover would have to occur (number…
A: Crossing over of chromosomes is the genetic material exchange which occurs among the two homologous…
Q: Difference between out crossing and cross breeding?
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Q: A cross between two heterozygous individuals in one gene resulted in one phenotype, explain?
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Q: The same team of researchers sets up an additional cross with this same population. They cross two…
A: Dominant allele always express themselves in heterozygous condition.
Q: "non parental" phenotypes in his dihybrid crosses. How can you explain this?
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Q: Why do test- crosses give a 1:1:1:1 ratio?
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Q: Punnett Square/Mono-Hybrid Cross: In cattle, black coat color is dominant to red coat color. Both…
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Q: When you testcross the offspring of ccWW x CCww, you get the following results: CcWw = 135 Ccww =…
A: A test cross is a cross between an individual organism with a dominating phenotype but uncertain…
Q: corn, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the male…
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Q: n Figure 4-19, what would be the RF between A/a andB/b in a cross in which purely by chance all…
A: ANSWER: Recombination frequency (θ) is the frequency with which a single chromosomal crossover will…
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Q: What evidence led to these decisions? There should be at least one line per pair
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Q: We will see an MII pattern when: There is no crossover between a gene and its centromere There is…
A: Crossover is the process of the exchange of genetic segments that occurs between homologous…
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Q: i) What are reciprocal crosses? ii) Provide an example of the reciprocal crosses this scientist…
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Q: What is the cross between the progeny of F1 and the homozygous reccessive parent called? How is it…
A: Introduction Monohybrid cross deals with one character controlled by one pair of alleles such as…
Q: Geneticists often carry out reciprocal crosses when they are studying the inheritance of traits. Why…
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: A diploid plant is heterozygous for two linked genes, A and B. Crossovers between the two genes…
A: Unlinked genes are those that are present on separate chromosomes, sometimes far apart, but on the…
Q: Why is a 50 percent recovery of single-crossover products theupper limit, even when crossing over…
A: The exchange of genetic material that happens in the germline is referred to as crossing over.…
Q: In sunflowers, two plants heterozygous for mutant (recessive) alleles b and e are crossed. For each…
A: Let, B and E be the dominant alleles and b and e be the recessive alleles. Each parent has…
Q: Alloploids are produced by crosses involving two different species. Explain why alloploids may be…
A: The condition in which cells consist of more than two homologous sets of the chromosome is called…
Q: In com, male sterility is controlled by maternal cytoplasmic elements. However, the presence of a…
A: Cytoplasmic male sterility is a phenomenon in which interactions between mitochondrial and genetic…
Interspecification crosses are rare in nature and intergenic crosses almost unknown.why?
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- In making genetic crosses, why is it important to identify the gametes that each individual can contribute?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 offspringWe have crossed true-breeding flies today. Wild type to mutant. Their phenotypes were wt and vg se. (Let’s not worry about males and females for now, just assume both genes are autosomal, which is normal in a Mendelian experiment). The results of a cross are phenotypes. I will be asking you for numbers or a ratio of phenotype numbers you expect to see in the offspring from this cross. To answer this, you’ll need to start with the genotypes of parents, then write their gametes, then write the offspring genotypes, then get the phenotypes based on them. Predict the results of this cross: In case both mutations are recessive; In case both mutations are dominant; In case vestigial wings are recessive and the sepia eyes are dominant.
- Given the karyotype shown at right, is this a male or a female? Normal or abnormal? What would the phenotype of this individual be?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?Figure 8.10 In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are dominant to green (y). What are the possible genotypes and phenotypes for a cross between PpYY and ppYy pea plants? How many squares would you need to complete a Punnett square analysis of this cross?
- + ec +/Y + + w/Y y ec +/Y + ec +/y ec w ++ w/y ec w у ес +у ес и Determine the order in which the three loci y, ec, and w Occur on the chromosome and prepare a linkage map. 7.22 A cross involving X-linked genes was made between yellow, bar, vermilion female fies and wild males, and the F1 females were crossed with y B v males. The following phenotypes were obtained when 1000 progeny were exam- ined: Dra ord ma the 7.2 546 244 160 50 + + + + Bv y Bv y+ + y+v y B+ and an and and and +B + re + + v ge Determine the order in which the three loci occur on the chromosome and prepare a linkage map. 7.23 Female Drosophila heterozygous for ebony (e"le), scarlet (st*/st), and spineless (ss*/ss) were testcrossed, and the following progeny were obtained: PROGENCY PHENOTYPES NUMBER ir Wild type Ebony Ebony, scarlet Ebony, spineless Ebony, scarlet, spineless Scarlet 67 8. 68 347 78 368 Scarlet, spineless Spineless (a) Are these genes linked? Justify your answer. (b) Write the genes given on a…An individual is heterozygous for a reciprocal translocation, with the following chromosomes: A • B C D E F A • B C V W X R ST • U D E F R ST • U V W X Q. Explain why the fertility of this individual is likely to be less than the fertility of an individual without a translocation.In Figure 5-18c, why is the crossover shown occurring inthe orange segments of DNA?
- Which of the following crosses can NEVER result in a recessive phenotype? Group of answer choices ttpp X TtPp TTPp X ttpp ttpp X TTPP TtPp X TtPpin three points mapping one parent has the A+C/+b+ genotype that was crossed to a homozygous recessive second parent. a)what is the genotype of this second parent? b)what are the genotypes of the double cross over offspring?How many different kinds of F1 gametes, F2 genotypes, and F2 phenotypes would be expected from the following crosses: (a) AA x aa; (b) AA BB x aa bb; (c) AA BB CC x aa bb cc? (d) What general formulas are suggested by these answers?