Can I get help with all of these questions. #2 New Problem for 3 sex-linked genes.Triply heterozygous females were mated to triply mutant males and obtained thefollowing results:(gene orders are not certain)+, +, +a, b, c35a, +, ++, b, c+, b, +35a, +, c75+, +, c385a, b, +a) Circle the parental genotypes.b) Box the double recombinants.c) Determine the order of the three loci on the X chromosomed) Estimate the gene distances between these alleles.a<→ba<→cb<→c#3 Calculate the level of interference using the genes above. (show your work)For problem #1:For problem #2: #1 Determine order/distance for linked genes.A Drosophila geneticist made a cross between females homozygous for three X-linkedrecessive mutations (a, a short body; b, oblong eye shape; c, colored eyes) and wild-type males.a) List the genotypes and phenotypes for the F1 progeny.The F1 females were then mated to triply mutant males. Notice that this is just a crossbetween the F1 progeny from above, and that the phenotype of the offspring will bedetermined by the maternal gametic contribution. The phenotypic results for the F1cross is as follows: (gene orders are not certain)a, b, c385a, +, ++, b, c+, b, +691.a, +, c+, +, ca, b, +3535b) Circle the parental genotypes.c) Box the double recombinants.d) Determine the order of the three loci on the X chromosomee) Estimate the gene distances between these alleles.つ个少9a+→c

(Males) AABBCC x aabbcc (females) b)- parental genotype +,+,+ = 400 a,b,c = 385 c) double…

#2 New Problem for 3 sex-linked genes. Triply heterozygous females were mated to triply mutant males and obtained the following results: (gene orders are not certain) +, +, + a, b, c 0. 0. a, +, + +, b, c +, b, + 35 35 70 75 a, +, c +, +, C 385 a, b, + 400 a) Circle the parental genotypes. b) Box the double recombinants. c) Determine the order of the three loci on the X chromosome d) Estimate the gene distances between these alleles. at>b a<→c b<>c

#2 New Problem for 3 sex-linked genes. Triply heterozygous females were mated to triply mutant males and obtained the following results: (gene orders are not certain) +, +, + a, b, c 0. 0. a, +, + +, b, c +, b, + 35 35 70 75 a, +, c +, +, C 385 a, b, + 400 a) Circle the parental genotypes. b) Box the double recombinants. c) Determine the order of the three loci on the X chromosome d) Estimate the gene distances between these alleles. at>b a<→c b<>c

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter11: Genome Alterations: Mutation And Epigenetics

Section: Chapter Questions

Problem 16QP: Familial retinoblastoma, a rare autosomal dominant defect, arose in a large family that had no prior...

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Two different strains of Drosophila melanogaster are mated in reciprocal crosses. When strain A males are crossed with strain B females, the progeny are normal. However, when strain A females are crossed with strain B males, there are many mutations and chromosome rearrangements in the gametes of the F1 progeny, and the F1 generation is effectively sterile. Explain these results.
Females of wild-type Strain A and males of mutant Strain B, as well as females of mutant Strain B and males of wild-type Strain A, make reciprocal crosses. Explain why reciprocal crosses are needed in genetics experiments involving Drosophila fruit flies.
I. Male Drosophila from a true-breeding wild-typestock were irradiated with X-rays and then mated withfemales from a true-breeding stock carrying the following recessive mutations on the X chromosome:yellow body (y), crossveinless wings (cv), cut wings(ct), singed bristles (sn), and miniature wings (m).These markers are known to map in the order:y - cv - ct - sn - mMost of the female progeny of this cross were phenotypically wild type, but one female exhibited ct and snphenotypes. When this exceptional ct sn female wasmated with a male from the true-breeding wild-typestock, twice as many females as males appearedamong the progeny.a. What is the nature of the X-ray-induced mutationpresent in the exceptional female?b. Draw the X chromosomes present in the exceptional ct sn female as they would appear duringpairing in meiosis.c. What phenotypic classes would you expect to seeamong the progeny produced by mating the exceptional ct sn female with a normal male from a truebreeding wild-type…
Considering the following chromosome which is represented as a series of genes on each arm separated by the centromere. Describe the type of mutation required to produce each of the mutant chromosomes below. ABCDEFG*HIJKLMN
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One of the X chromosomes in a particular Drosophila female had a normal order of genes but carried recessive alleles of the genes for yellow body color (y), vermilion eye color (v), and forked bristles (f), as well as the dominant X-linked Bar eye mutation (B). Her other X chromosome carried the wild-type alleles of all four genes, but the region including y+, v+, and f+ (but not B+) was inverted with respect to the normal order of genes. This female was crossed to a wild-type male in the cross diagrammed her. The cross produced the following male offspring: Y v f B 48 y+ v+ f+ B+ 45 y v f B+ 11 y+ v+ f+ B 8 y v f B 1 y+ v+ f+ B+ 1 a. Why are there no male offspring with the allele combinations y v f+, v+ v+ f, y v+ f+, or y+ v f (regardless of the allele of the Bar eye gene)? b.What kinds of crossovers produced the y v f b+ and v+ y+ f+ B offspring? Can you determine any genetic distances from these classed of progeny? c. What kinds of crossovers produced the…
One of the X chromosomes in a particular Drosophila female had a normal order of genes but carried recessive alleles of the genes for yellow body color (y), vermilion eye color (v), and forked bristles (f), as well as the dominant X-linked Bar eye mutation (B). Her other X chromosome carried the wild-type alleles of all four genes, but the region including y+, v+, and f+ (but not B+) was inverted with respect to the normal order of genes. This female was crossed to a wild- type male in the cross diagrammed her. The cross produced the following male offspring:* table in figure a. Why are there no male offspring with the allele combinations y v f+, v+ v+ f, y v+ f+, or y+ v f (regardless of the allele of the Bar eye gene)?b. What kinds of crossovers produced the y v f b+ and v+ y+ f+ B offspring? Can you determine any genetic distances from these classed of progeny?c. What kinds of crossovers produced the y+ v f+ B+ and y v+ f B offspring?