Use the following information to answer then next question. Two different genes control the expression of kernel colour in Mexican black corn: black pigment gene B and dotted pigment gene D. Gene B influences the expression of gene D. The dotted phenotype appears only when gene B is in the homozygous recessive state. A colourless variation occurs when both genes are homozygous recessive. After pure-breeding black-pigmented plants were crossed with colourless plants, all of the offspring were black-pigmented. What is the probability of dotted offspring being produced from the test cross described above? (Record your answer as a whole number percentage). Answer:

Use the following information to answer then next question. Two different genes control the expression of kernel colour in Mexican black corn: black pigment gene B and dotted pigment gene D. Gene B influences the expression of gene D. The dotted phenotype appears only when gene B is in the homozygous recessive state. A colourless variation occurs when both genes are homozygous recessive. After pure-breeding black-pigmented plants were crossed with colourless plants, all of the offspring were black-pigmented. What is the probability of dotted offspring being produced from the test cross described above? (Record your answer as a whole number percentage). Answer:

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Description: Use the following information to answer thennext question.Two different genes control the expression of kernelcolour in Mexican black corn: black pigment gene B anddotted pigment gene D. Gene B influences theexpression of gene D. The dotted phenotyp

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 genes control the expression of kernelcolour in Mexican black corn: a black pigment gene (B)and a dotted pigment gene (D). Gene B influences theexpression of gene D. The dotted phenotype appearsonly when gene B is in the homozygous recessivestate. A colourless variation occurs when both genesare homozygous recessive.After pure-breeding black-pigmented plants werecrossed with colourless plants, all offspring wereblack-pigmented. Plants of the F1 generation are suspected of being heterozygous for both genes. A test crossof colourless plants with the heterozygote plants should produce a genotypic ratio in theoffspring ofa. 1:0b. 3:1c. 2:1:1d. 1:1:1:1
Two different genes control the expression of kernelcolour in Mexican black corn: a black pigment gene (B)and a dotted pigment gene (D). Gene B influences theexpression of gene D. The dotted phenotype appearsonly when gene B is in the homozygous recessivestate. A colourless variation occurs when both genesare homozygous recessive.After pure-breeding black-pigmented plants werecrossed with colourless plants, all offspring wereblack-pigmented. The genotypes of the parents of these F1 offspring could bea. BBDD × bbddb. BbDD × bbddc. Bbdd × bbDDd. bbDD × BBdd
The following list of four Drosophila mutations indicates the symbol for the mutation, the name of thegene, and the mutant phenotype:Allele symbol Gene name Mutant phenotypedwp dwarp small body, warped wingsrmp rumpled deranged bristlespld pallid pale wingsrv raven dark eyes and bodiesYou perform the following crosses with the indicatedresults:Cross #1: dwarp, rumpled females × pallid, raven males→ dwarp, rumpled males and wild-type femalesCross #2: pallid, raven females × dwarp, rumpled males→ pallid, raven males and wild-type femalesF1 females from cross #1 were crossed to males froma true-breeding dwarp rumpled pallid raven stock.The 1000 progeny obtained were as follows:pallid 3pallid, raven 428pallid, raven, rumpled 48pallid, rumpled 23dwarp, raven 22dwarp, raven, rumpled 2dwarp, rumpled 427dwarp 47Indicate the best map for these four genes, includingall relevant data. Calculate interference values whereappropriate.
In Drosophila, the autosomal recessive brown eyecolor mutation displays interactions with both theX-linked recessive vermilion mutation and the autosomal recessive scarlet mutation. Flies homozygous for brown and simultaneously hemizygous orhomozygous for vermilion have white eyes. Fliessimultaneously homozygous for both the brown andscarlet mutations also have white eyes. Predict theF1 and F2 progeny of crossing the following truebreeding parents:a. vermilion females × brown malesb. brown females × vermilion malesc. scarlet females × brown malesd. brown females × scarlet males
White fruit color in summer squash is dependent on a dominant gene (W) and colored fruit to the recessive gene (w). In the presence of ww a dominant gene D produces yellow color, but when D is not present, the color is green. Upload your solution in the google classroom. Give the: F1_phenotypes_expected_from_crossing_white_fruited_WWDD_with_green_fruited_wwdd_plant F2_phenotypes_expected_from_crossing_the_F1 F2_phenotypic_ratio_expected_from_crossing_the_F1 F2_genotypic_ratio_expected_from_crossing_the_F1 Type_of_epistatis Write all phenotypes in CAPITAL letters SEPARATED BY COMMA. Write all ratio in numerical values without spaces
In humans, the glucose-6-phosphate dehydrogenase (G6PD) gene involved in sugar metabolismis X-linked. The dominant allele (G) codes for fast enzymes for normal cell functioning while the recessiveallele (g) codes for slow enzymes, which are responsible for the reduced enzymatic activity of cells.However, the presence of slow enzymes has minimal effect in the overall functioning of heterozygotes,thus normal. Recessives, however, are more prone to oxidative reactions that speed up the celldamaging process, thus weak (but not lethal). If random inactivation occurs during dosage compensation,what would be the genotypes and phenotypes of the children of a heterozygous mother and a recessivefather?
Another recessive mutation in Drosophila, ebony (e), is on anautosome (chromosome 3) and causes darkening of the bodycompared with wild-type flies. What phenotypic F1 and F2 maleand female ratios will result if a scalloped-winged female withnormal body color is crossed with a normal-winged ebony male?Work this problem by both the Punnett square method and theforked-line method.
Familial retinoblastoma, a rare autosomal dominant defect, arose in a large family that had no prior history of the disease. Consider the following pedigree (the darkly colored symbols represent affected individuals): a. Circle the individual(s) in which the mutation most likely occurred. b. Is the person who is the source of the mutation affected by retinoblastoma? Justify your answer. c. Assuming that the mutant allele is fully penetrant, what is the chance that an affected individual will have an affected child?
A researcher crosses two white-flowered lines ofAntirrhinum plants as follows and obtains the followingresults:pure line 1 × pure line 2↓F1 all whiteF1 × F1↓F2 131 white29 reda. Deduce the inheritance of these phenotypes; useclearly defined gene symbols. Give the genotypes ofthe parents, F1, and F2.b. Predict the outcome of crosses of the F1 with eachparental line.
Two different genes control the expression of kernel colour in Mexican black corn: a black pigment gene (B) and a dotted pigment gene (D). Gene B influences the expression of gene D. The dotted phenotype appears only when gene B is in the homozygous recessive state. A colourless variation occurs when both genes are homozygous recessive. After pure-breeding black-pigmented plants were crossed with colourless plants, all offspring were black-pigmented. Plants of the F 1generation are suspected of being heterozygous for both genes. A test cross of colourless plants with the heterozygote plants should produce a genotypic ratio in the offspring of A. 1:0 B. 3:1 C. 2:1:1 D. 1:1:1:1
In individuals affected by cystic fibrosis, salt crystals may appear afterperspiration dries up. In addition, the disease causes respiratory disorderswhich can be both debilitating and lethal. It occurs in individuals homozygousfor the recessive gene. Two normal parents had a daughter with thesymptoms of this disease, and a normal son who marries a normal womanwith an afflicted A test (salt concentration in perspiration of heterozygotes ishigher than normal) disclosed that both are indeed carriers of the gene. If thefirst child born to the mating in (b) was defective, what is the probability thatthe 2nd child would also be defective?Express answer in fraction form
At least two pairs of genes control eye color. Both pairs influence the production of the pigment, melanin, but act independently. One pair of alleles is B (Brown color; dominant) and b (blue color); the other pair is A (pigment production; dominant) and a (no pigment production; albino). The gene pair aais epistatic to (masks) B and b and produces the nonpigmented eyes of the albino. What is the typeof gene interaction that exists between the two gene pairs? Give the genotypes and phenotypes of the possible offspring of the mating bbAa x Bbaa andi ndicate the parental phenotypes. (any method)