he pairwise map distances for four linked genes are as follows: A-B = 28 m.u., B-C = 15 m.u., C-D = 25 m.u., B-D = 10 m.u., A-D = 38 m.u., A-C = 13 m.u. What is the order of these four genes? a. ACBD b. CADB c. ABDC d. ABCD
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The pairwise map distances for four linked genes are as follows: A-B = 28 m.u., B-C = 15 m.u., C-D = 25 m.u., B-D = 10 m.u., A-D = 38 m.u., A-C = 13 m.u. What is the order of these four genes?
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- Genes A and B are 6 map units apart, and A and C are 4 map units apart. Which gene is in the middle if B and C are 10 map units apart? Which is in the middle if B and C are 2 map units apart?What is the most likely order of the linked genes R, S, and T if the distance between R and S is 22 cM, the distance between S and T is 8cM, and the distance between R and T is 14 cM? A. R S T B. T R S C. Cannot be determined D. S T RYou are studying 5 genes: a, b, c, d, and e. In an attempt to map them, you perform a series of two-point crosses with the results listed below. Select the appropriate gene order based on the results of your experiment. a-b = 20 map units; a-c = 16 map units; a-d = 12 map unit; b-d = 8 map units; b-e = 4 map units; c-d = 28 map units; c-e = 40 map units; d-e = 12 map units. Group of answer choices 1)e-b-a-c-d 2)e-b-d-a-c 3)a-c-e-b-d 4)a-b-c-d-e
- 2. You are making a genetic map and use a cross to measure the distance between genes H and J as 40cMand the distance between J and M as 20cM. When you measure the distance between genes H and M, you get 50 cM. Do the following (A-C). (A) Draw and label a map of genes H, J, and M. (B) What is the genetic distance between genes H and M? How do you know? (Answer in 1 sentence) (C) Complete the table (right). For each pair of genes, write “yes” or “no” to indicate whether the pair of genes are“linked genes” and/orpart of the same“linkage group”.describe two blotting methods (i.e., Northern blottingand Western blotting) used to detect gene products. Northern blotting detects RNA and Western blotting detects proteins. Supposethat a female fruit fly is heterozygous for a maternal effect gene,which we will call gene B. The female is Bb. The normal allele, B,encodes a functional mRNA that is 550 nucleotides long. A recessive allele, b, encodes a shorter mRNA that is 375 nucleotideslong. (Allele b is due to a deletion within this gene.) How couldyou use one or more of these techniques to show that nurse cellstransfer gene products from gene B to developing oocytes? Youmay assume that you can dissect the ovaries of fruit flies and isolate oocytes separately from nurse cells. In your answer, describeyour expected results.In a study showing that approximately 10% of protein-coding genes are essential for Cell survival .This translates into which of the following number of essential genes in the human genome .a)100 b) 500 c)1000 d)2000
- In a three-point mapping experiment for the genes a-w-ec, the following percentages of events are observed: NCO events: 57%; SCO events between a and w: 18%; SCO events between w and ec: 22%; DCO events: 2% Assuming that w is in the middle, what is the map distance between w and ec? What is the map distance between a and w? Draw the map.Consider two maize plants:a. Genotype C/c m ; Ac/Ac+, where cm is an unstable allele caused by a Ds insertionb. Genotype C/c m, where cm is an unstable allele caused by Ac insertionWhat phenotypes would be produced and in what proportions when (1) each plant is crossed with a basepair-substitution mutant c/c and (2) the plant in part a is crossed with the plant in part b? Assume that Ac and c are unlinked, that the chromosome-breakage frequency is negligible, and that mutant c /C is Ac+.The diagram below is a linkage map. Choose the answer that best describes the relationship between each of the pairs of genes listed. Are they in the same linkage group or different? Are they linked genes or unlinked? R-S? E-P? E-S? L-B? X-L? R-X? P-B? X-B? Choose from the following: Same linkage, different group Different linkage groups, linked Same linkage group, unlinked Different linkage groups, unlinked
- The color of chickens is determined by interacting loci: AA or Aa give white, aaBB or aaBb give colored, and aabb produce white. Describe the epistatic interactions occurring between these two genes: A. aa is epistatic to B_, bb and bb are epistatic to A_,aa B. A_ is epistatic to B_,bb and bb is epistatic to A_,aa C. None of the aboveIdentity gene 1 (bl, pr, vg) Identity gene 2 ( bl, pr, vg) Identity gene 3 ( bl,pr, vg) How many map units separate genes 1 and 2 ( Distance 1)? How many map units separate genes 2 and 3 ( distances 2) ?A three point cross is carried out and the following 1000 offspring are recovered. PHENOTYPES NUMBER OBSERVED CP+ 5 CPR 330 C++ 115 C+R 70 +++ 385 ++R 10 +PR 70 +P+ 15 - A. B. C. D. E. What is the correct gene map for these genes? (A-E) F. G. H. I. J. What is the interference value? (F-J) A. P----20----C----10----R B. P----20----R----10----C C. C----20----R----10----P D. R----20----C----10----P E. C----20----P----10----R…