6. In a chemical mutagenesis experiment to determine whether two mutated parents could producenew phenotypes or not. In parent one mutated gene produced white fruit color (W) which isdominant over yellow fruit color (w) and in parent two mutant produce a gene that is disk-shapedfruit (D) which is dominant over sphere-shaped fruit (d). If both parent one and two crossed. a.What are the genotypes of the parents of the cross?Parent 1 genotype:Parent 2 genotype:Fl progeny genotype:b. If the scientist allowed the self-cross in F1 progeny to generate F2 generation. Use thetable below to draw a Punnett square that predicts the phenotypic and genotypicdistribution of the F, progeny.Genotypic ratio:Phenotypic ratio:c. What is the combined F2 ratios.....d. What percent will be white type and yellow fruit?

W gene encodes white color and it is dominant over w allele. The ww genotype encodes yellow color.…

6. In a chemical mutagenesis experiment to determine whether two mutated parents could produce new phenotypes or not. In parent one mutated gene produced white fruit color (W) which is dominant over yellow fruit color (w) and in parent two mutant produce a gene that is disk-shaped fruit (D) which is dominant over sphere-shaped fruit (d). If both parent one and two crossed.

6. In a chemical mutagenesis experiment to determine whether two mutated parents could produce new phenotypes or not. In parent one mutated gene produced white fruit color (W) which is dominant over yellow fruit color (w) and in parent two mutant produce a gene that is disk-shaped fruit (D) which is dominant over sphere-shaped fruit (d). If both parent one and two crossed.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter13: Genes, Chromosomes, And Human Genetics

Section: Chapter Questions

Problem 8TYK: Another gene in Drosophila determines wing length. The dominant wild-type allele of this gene...

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6. A diploid strain of yeast was made by mating a haploidstrain with a genotype w−, x−, y−, and z− with a haploidstrain of opposite mating type that is wild type for thesefour genes. The diploid strain was phenotypically wildtype. Four different X-ray-induced diploid mutantswith the following phenotypes were produced fromthis diploid yeast strain. Assume a single new mutation is present in each strain.Strain 1 w− x+ y− z+Strain 2 w+ x− y− z−Strain 3 w− x+ y− z−Strain 4 w− x+ y+ z+When these mutant diploid strains of yeast go throughmeiosis, each ascus is found to contain only two viablehaploid spores.a. What kind of mutations were induced by X-rays tomake the listed diploid strains?b. Why did two spores in each ascus die?
1. In corn, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the male part of 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. Using the following color-coded circles, simulate the crosses indicated below. Put the illustrations of crosses in the spaces provided. Be sure to include in the labels the genotypes and phenotypes of the offspring in each cross. Big light green circle cytoplasm Big orange circle cytoplasm Small orange circle Small half-light green-half-orange circle - Ff nucleus Small light-green circle - male-sterile - male-fertile - FF nucleus - ff nucleus a. Male-sterile female x FF male (the term male-sterile is an adjective that describes the female) b. Male-sterile female x Ff male (the term male-sterile is an adjective…
5. A cross between two wild-type flies gave progeny all of which were wild type. When vg e they were test crossed to flies the following results were obtained: vg e (a) 4 of the test crosses gave wild type, vestigal ebony, vestigal and ebony in a 1:1:1:1 ratio. (b) 4 of the test crosses gave all wild type. (c) 4 of the test crosses gave vestigal and wild type in a 1:1 ratio. (d) 4 of the test crosses gave ebony and wild type in a 1:1 ratio. What are the genotypes of the original pair of wild-type flies?
3. While working with a type of beetle that is normally smooth, large and white, you discover 3 mutations that lead to the recessive phenotypes bumpy, small and grey, respectively. You cross true-breeding smooth white beetles to true-breeding bumpy grey beetles and get all smooth white F1 beetles. Then, your cross the F1 beetles to true- breeding bumpy grey beetles and, after analyzing 800 F2s, calculate a map distance of 5 cM between the smoothness and color loci. a. What are the 4 phenotypic classes you get in the F2? Fill in the table below. For the body type (i.e., smooth or bumpy), use S or s to designate the alleles. For the color (i.e., white or grey), use W or w to designate the alleles. For the size (i.e., large or small), use L or 1 to designate the alleles. Genotypic class Phenotypic class Number of this phenotype 380 380 20 20 b. You cross 2 true-breeding parents to get all F1 beetles that are large and smooth. You cross the F1 to true-breeding small, bumpy beetles and get:…
2. Drosophila females heterozygous for three recessive x-linked markers y (yellow bodies), ct (cut wings), and m (miniature wings) were crossed to y ct m males and the following progeny were obtained. F1 Phenotype Yellow, cut, miniature Wildtype Yellow Cut, miniature miniature Number cut 60 63 20 13 Yellow, cut 15 Yellow, miniature 5 22 2 a) F1 Genotype b) Recombinant or Parental? c) SCO, DCO, or NONE? a) Fill in the table with the genotypes of each progeny type, use + to indicate wildtype/dominant traits, show separate homologues. b) In the table, identify whether each progeny type is Recombinant (R) or Parental (P). c) In the table, identify whether each progeny type results from a single crossover (SCO), a double crossover (DCO), or no crossing over (NONE). d) Diagram the parental cross, clearly indicating allelic contributions from each homologue of parental flies. Heterozygous wild-type Female Fly X Hemizygous mutant Male fly // // e) Draw the genetic map showing correct order and…
5. Flower color is determined by the pathway below. You a crossing a true-breeding white-flowered plant thatcannot produce gene A and a true-breeding white-flowered plant that cannot produce gene B.Gene A Gene BWhite  White  Purplea. What are the genotypes of the P-generation?b. What are the genotypes and phenotypes of the F1 generation?c. What are the genotypes and phenotypes of the F2 generation? What is the phenotypic ratio?(Purple:White)
Another gene in Drosophila determines wing length. The dominant wild-type allele of this gene produces long wings; a recessive allele produces vestigial (short) wings. A female that is true- breeding for red eyes and long wings is mated with a male that has purple eyes and vestigial wings. F1 females are then crossed with purple-eyed, vestigial-winged males. From this second cross, a total of 600 offspring are obtained with the following combinations of traits: 252 with red eyes and long wings 276 with purple eyes and vestigial wings 42 with red eyes and vestigial wings 30 with purple eyes and long wings Are the genes linked, unlinked, or sex-linked? If they are linked, how many map units separate them on the chromosome?
5. In the tomato the mutant genes o (oblate = flattened fruit), p (peach = hairy fruit), and s (compound inflorescence = many flowers in a cluster) were found to be linked on chromosome 2. A testcross with a heterozygote was done, yielding the following progeny:. +++ = ++s = +p+ +ps o++ = ots= op+ ops = = = = 73 348 2 96 110 2 306 63 Determine a) the sequence and arrangement of the genes in the heterozygous parent; and b) the distance between the three genes.
6. Dihybrid crosses. A pea plant that is heterozygous for seed form and flower color is crossed with a heterozygous seed shape and white flower plant. Predict the geno- type and the phenotype of the first filial (F1) generation. (Use a Punnet table.) DNA Biochno og n 115
1. In maize, the following genes are linked on chromosome 3: va - variable sterile v - virescent gl - glossy leaves Two homozygous plants were crossed and produced an all normal F1. When the F1 was test-crossed, progeny phenotypes appeared as follows: 235 virescent 7.glossy 60 wild 40 variable sterile 270 variable sterile, glossy 62 variable sterile, virescent, glossy Diagram the chromosome map for the 3 loci Example: a--1.00 cM--b--2.00 CM--c--3.00 CM Significant # of decimal places for answer: 2 Answer: 48 virescent, glossy 4 variable sterile, virescent 2. Two hypothetical autosomal human genes are 10 cM apart. These dominant alleles are completely penetrant and respectively cause crossed eyes (e+) and small thumbs (th+). A cross-eyed, small thumbed woman marries a normal man and they have 4 children. Two of the children are cross-eyed and two of the children have small thumbs. The woman is pregnant with a 5th What is the probability that this child will be cross-eyed and have small…
5. In Drosophila flies, the allele b gives a black body, and the allele b* gives brown, the wild-type phenotype. The allele wx of a separate gene gives waxy wings, and wx" gives non-waxy. The allele cn of a third gene gives cinnabareyes, and cn* gives red. Afemale heterozygous for these three genes is testcrossed, and 700 progenies are produced which are phenotypically classified as follows: 3 b* wx* cn* 63 b wx*cn+ 25 b* wx cn* 2 b wx cn 252 b* wx* cn 33 b wx* cn 75 b* wx cn 247 b wx cn* Make a linkage map of the three genes. Compute for interference and explain what the derived value means. Show complete solutions to support your answers.
2. In corn, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the male part of 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. Using the following color-coded circles, simulate the crosses indicated below. Put the illustrations of crosses in the spaces provided. Be sure to include in the labels the genotypes and phenotypes of the offspring in each cross. Big light green circle Big orange circle Small orange circle Small half-light green-half-orange circle - Ff nucleus Small light-green circle - male-sterile cytoplasm - male-fertile cytoplasm - FF nucleus - ff nucleus a. Male-sterile female x FF male (the term male-sterile is an adjective that describes the female) b. Male-sterile female x Ff male (the term male-sterile is an adjective…