In a cross in Drosophila involving the X-linked recessive eye mutationwhite and the autosomally linked recessive eye mutation sepia(resulting in a dark eye), predict the F1 and F2 results of crossingtrue-breeding parents of the following phenotypes:(a) white females * sepia males(b) sepia females * white malesNote that white is epistatic to the expression of sepia
Q: In Drosophila, the autosomal recessive brown eyecolor mutation displays interactions with both…
A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: In Drosophila melanogaster, white eyes (w) is an X-linked recessive mutation. Normal eyes are red…
A: The normal eyes are red in Drosophila melanogaster. Normal red eyes are represented by W. Whereas,…
Q: A geneticist is using a three-point testeross to map three linked Drosophila recessive mutations…
A: Gene mapping is a process through which scientists can evaluate the presence and position of genes…
Q: In the fruit fly, recessive mutations in either of two independently assorting genes, brown and…
A: In Drosophila, as well as in many other plants and animals, pigmentation is highly variable both…
Q: n Drosophila, vermilion eye color is due to a recessive allele (v) located on the X chromosome.…
A: assuming that : The wild type = allele+ / allele+ Heterozygote = allele+ / allele Mutants = allele…
Q: The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by a recessive…
A: It is given that the vestigial wing and hairy body are caused by recessive wings. These are encoded…
Q: Miniature wings (Xm) in Drosophila result from an X-linked allele that is recessive to the allele…
A: Alleles are the alternative forms of a gene. Allele can be dominant or recessive.
Q: Below is a pedigree from one family (two parents and eight children). Four of the children…
A: Pedigree chart It is a diagram that represents the occurrence of phenotypes of a particular gene in…
Q: Bar (B) is a dominant sex-linked mutant of D. melanogaster. Held-out wings and ebony body are…
A: Bar eye character (B) is a sex dominant character.
Q: Figure 5.1 presented abbreviated pedigrees looking at the inheritance of X-linked human conditions.…
A: Double heterozygote = Individual 1 in generation II, if the mother in generation I is homozygous…
Q: White eye color is a recessive sex-linked trait in fruit flies. If a whiteeyed Drosophila female is…
A: Genes are the hereditary unit of an organism. The DNA (deoxyribonucleic acid) forms the genes. DNA…
Q: A maternal effect gene in Drosophila, called torso, occurs as a functionalallele (torso+) and a…
A: Drosophila consist of acorn-head-thorax-abdomen-telson part.
Q: The Drosophila fruit fly genes ebony (e) and claret (ca) are linked on chromosome 3. In Drosophila,…
A: Given that, the genes of the Drosophila fruit fly ebony and claret are linked on chromosome 3. The…
Q: In 1995, doctors reported a Chinese family in whichretinitis pigmentosa (progressive degeneration of…
A: Since you have posted a question with multiple sub-parts, we are answering only first one for you.…
Q: Male Drosophila expressing the autosomal recessivemutations sc (scute), ec (echinus), cv…
A: Locus is the specific location of gene in a chromosome. The inheritance of two different characters…
Q: Black body (b) and purple eye (pr) are recessive autosomal mutations in Drosophila. Bridges are…
A: b - allele for black body - recessive pr - allele for purple eye - recessive B - wild type for body…
Q: White eyes is a Drosophila phenotype that is linked to a mutant, recessive, X- inked allele.…
A: Sex-linked(X-linked) inheritance is a type of criss-cross inheritance, where the traits from the…
Q: In Drosophila, a cross was made between females and wild-type males. The female parents expressed…
A: In Drosophila , there are three types of trait :- A ) Trait for wing B ) Trait for body colour C…
Q: Another recessive mutation in Drosophila, ebony (e), is on anautosome (chromosome 3) and causes…
A: The scalloped wing phenotype is produced due to a recessive mutation in the X chromosome. The…
Q: Miniature wings (Xm) in Drosophila result from an X-linked allele that is recessive to the allele…
A: Given: Miniature wings Xm - recessive Long wings X+ - dominant Male parent - long wings Female…
Q: The mutant genes for vestigial wings and singed bristles are approximately 30 map units apart on…
A: Each gene has two alleles, one is a dominant allele and another is a recessive allele. If the mutant…
Q: The recessive alleles k (kidney-shaped eyes instead ofwild-type round), c (cardinal-colored eyes…
A: Inheritance or heredity is passing-on one trait from the parents to the progeny by either asexual or…
Q: In Drosophila, males from a true-breeding stock withraspberry-colored eyes were mated to females…
A: Recombination frequency (RF) is the rate of occurrence of recombination between a pair of linked…
Q: n Drosophila, gray body color is dominant over ebony body color, while long wings are dominant over…
A: answer is given below...
Q: In Drosophila, gray body color is dominant to ebony body color, while long wings are dominant to…
A: Genotype is defined as the complete set of genes present in the individual and the information of…
Q: In Drosophila, three autosomal genes have the following map:20 m.u. 10 m.u.a b ca. Provide the data,…
A: Gene mapping is the way in which a genetic map is designed that will use recombination frequency…
Q: The recessive, X-linked z1mutation of the Drosophilagene zeste (z) can produce a yellow (zeste) eye…
A: Gene is the specific sequence of nucleotide in deoxyribonucleic acid (DNA) or ribonucleic acid (RNA)…
Q: Duchenne muscular dystrophy is a recessive disorder caused by a rare,loss-of-function allele that is…
A: Duchenne muscular dystrophy (DMD) is a quickly progressive type of muscular dystrophy that happens…
Q: In Drosophila melanogaster, white eyes (w) is an X-linked recessive mutation. Normal eyes are red…
A: Inheritance is defined as the passing of genetic inheritance from parental to next generation.
Q: You have a Drosophila line that is homozygous for autosomal recessive alleles a, b, and c, linked in…
A: Recombination frequency measures the genetic linkage between a set of alleles/genes and is used to…
Q: a. In Drosophila, crosses between F1 heterozygotes ofthe form A b / a B always yield the same ratio…
A: Since you have posted a question with multiple sub-parts, we are answering only first one for you.…
Q: In Drosophila, the genes ct(cut wing margin), y (yellow body), and v (vermilion eye color) are…
A: Crossing over of chromosome during meiosis is normal process occurring so that there can be…
Q: In Drosophila, ebony body colour is produced by a recessive gene a and wild-type (gray) body colour…
A: Answer: DIHYBRID CROSS : It is the cross made between two traits of an individual.
Q: In Drosophila melanogaster white (w) and miniature (m) wings are controlled by X-linked recessive…
A:
Q: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…
A: The initial step is to decide the request for the three genes.This should be possible by assessing…
Q: Given the following alleles that control the traits of Drosophila melanogaster: R = red eyes L =…
A: In this step the order of gene may be wrong, the correct order we will specify in further steps.…
Q: Consider the following three autosomal recessive mutations in Drosophila: vestigial wings (v); wild…
A: Three point test cross is given in the question. The F2 progenies is used to find the middle gene.
Q: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…
A: Inheritance or heredity is passing-on one trait from the parents to the progeny by either asexual or…
Q: Referring to the pattern of inheritance of comb type and feathering in chicken, consider the cross…
A: Here the hen is given heterozygous feathering and walnut comb and cock is walnut comb and feathered…
Q: In Drosophila, a heterozygous female for the X-linkedrecessive traits a, b, and c was crossed to a…
A: A dihybrid cross with unlinked markers should produce a 1:1:1:1 ratio, according to Mendel's…
Q: . In mice, the dominant allele Gs of the X-linked geneGreasy produces shiny fur, while the recessive…
A: In mice, the dominant allele Gs of the X-linked gene Greasy gives shiny fur. The recessive wild-type…
Q: In Drosophila, the autosomal recessive dp allele ofthe dumpy gene produces short, curved wings,…
A: Since you have posted a question with multiple sub-parts, we are answering only first two for you.…
Q: Miniature wings in Drosophila melanogaster are due to an X-linked gene (Xm) that is recessive to an…
A: It is given that alleles for the trait for miniature wings (Xm) in Drosophila melanogaster are…
Q: The genes for mahogany eyes and ebony body are approximately 18 map units apart on chromosome III in…
A: In Drosophila + indicates wild-type allele for any gene, m = mahogany e = ebony.Female parents are…
Q: Vermilion eye color in Drosophila is sex-linked and recessive. What would be the phenotypes of male…
A: Vermilion eye color in Drosophila is a sex-linked and recessive characteristic. This sex-linked…
Q: Miniature wings in Drosophila result from an X-linked allele (Xm) that is recessive to the allele…
A: If the X chromosome is to autosome pair ratio in the Drosophila is 1, the fly would be female. If…
Q: Miniature wings in Drosophila result from an X-linked allele (Xm) that is recessive to the allele…
A: The X-linked inheritance is the transfer of X-chromosome from one generation to another. In females,…
Q: Another cross in Drosophila involved the recessive, X-linked genes yellow (y), white (w), and cut…
A: As per out honor code, we are allowed to answer only three subparts. You have posted multiple…
Q: Female Drosophila heterozygous for three recessive mutations e (ebony body), st (scarlet eyes), and…
A: Female Drosophila heterozygous for three recessive mutations e (ebony body), st (scarlet eyes), and…
Q: The genes for the recessive traits of mahogany eyes and ebony body are approximately 30 map units…
A: Given- Recessive traits of mahogany eyes and ebony body are 30 map units apart. Both traits are…
In a cross in Drosophila involving the X-linked recessive eye mutation
white and the autosomally linked recessive eye mutation sepia
(resulting in a dark eye), predict the F1 and F2 results of crossing
true-breeding parents of the following
(a) white females * sepia males
(b) sepia females * white males
Note that white is epistatic to the expression of sepia
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
- Vermilion eye color in Drosophila is sex-linked and recessive. What would be the phenotypes of maleand female progenies of a cross between a vermilion female and wild-type (red) male?In drosophila, a recessive mutation (m-) of a maternal effect gene results in an abnormal phenotype wherein homozygous (m-m-) females produce eggs that cannot support embryonic development. Homozygous (m-m-) males, however, can still produce viable sperm. Using m+ to denote a normal gene, determine the genotypes and phenotypes of the F1s produce by a cross between a heterozygous female and a recessive male. From the offspring, backcross the recessive female with the paternal strain. What are the genotypes and phenotypes of the F2s? Show COMPLETE cross for both cases. If m-m- females produce useless eggs, then how are m-m- produced?The genes for mahogany eyes and ebony body are approximately 18 map units apart on chromosome III in Drosophila. Assume that a mahogany-eyed female was mated to an ebony-bodied male, and the resulting F1 phenotypically wild-type females were mated to mahogany-ebony males. Of 942 offspring, what would be the expected phenotypes and in what numbers would they be expected?
- In Drosophila, an X-linked recessive mutation, Xm causes miniature wings. List the F2 phenotypic ratios if: a miniature-winged female is crossed with a normal male and a miniature-winged male is crossed with a normal female. What would the phenotypic ratio from (a) be if the miniature-winged gene were autosomal? Assume in all cases that the P1 individuals are true-breeding.. The production of pigment in the outer layer of seedsof corn requires each of the three independently assorting genes A, C, and R to be represented by at leastone dominant allele, as specified in Problem 64. Thedominant allele Pr of a fourth independently assortinggene is required to convert the biochemical precursorinto a purple pigment, and its recessive allele pr makesthe pigment red. Plants that do not produce pigmenthave yellow seeds. Consider a cross of a strain of genotype A/A ; C/C ; R/R ; pr/pr with a strain of genotypea/a ; c/c ; r/r ; Pr/Pr.a. What are the phenotypes of the parents?b. What will be the phenotype of the F1?c. What phenotypes, and in what proportions, willappear in the progeny of a selfed F1?d. What progeny proportions do you predict from thetestcross of an F1?In drosophila, a recessive mutation (m-) of a maternal effect gene results in an abnormal phenotype wherein homozygous (m-m-) females produce eggs that cannot support embryonic development. Homozygous (m-m-) males, however, can still produce viable sperm. (A) Using m+ to denote a normal gene, determine the genotypes and phenotypes of the F1s produce by a cross between a heterozygous female and a recessive male. (B) From the offspring, backcross the recessive female with the paternal strain. What are the genotypes and phenotypes of the F2s? (C) If m-m- females produce useless eggs, then how are m-m- produced?
- 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.You have a Drosophila line that is homozygous for autosomal recessive alleles a, b, and c, linked in that order. Youcross females of this line with males homozygous for thecorresponding wild-type alleles. You then cross the F1 heterozygous males with their heterozygous sisters. You obtain the following F2 phenotypes (where letters denoterecessive phenotypes and pluses denote wild-type phenotypes): 1364 + + +, 365 a b c, 87 a b +, 84 + + c,47 a + +, 44 + b c, 5 a + c, and 4 + b +.a. What is the recombinant frequency between a andb? Between b and c? (Remember, there is no crossingover in Drosophila males.)b. What is the coefficient of coincidence?Miniature wings in Drosophila result from an X-linked allele (Xm) that is recessive to the allele for long wings (X+). Sepia eyes are produced by an autosomal allele (s) that is recessive to an allele for red eyes (s+). Q. A female fly that has miniature wings and sepia eyes is crossed with a male that has normal wings and is homozygous for red eyes. The F1 flies are intercrossed to produce the F2. Give the phenotypes, as well as their expected proportions, of the F1 and F2 flies.
- Miniature wings in Drosophila result from an X-linked allele (Xm) that is recessive to the allele for long wings (X+). Sepia eyes are produced by an autosomal allele (s) that is recessive to an allele for red eyes (s+). a. A female fly that has miniature wings and sepia eyes is crossed with a male that has normal wings and is homozygous for red eyes. The F1 flies are intercrossed to produce the F2. Give the phenotypes, as well as their expected proportions, of the F1 and F2 flies. b. A female fly that is homozygous for normal wings and has sepia eyes is crossed with a male that has miniature wings and is homozygous for red eyes. The F1 flies are intercrossed to produce the F2. Give the phenotypes, as well as their expected proportions, of the F1 and F2 flies.In mice, the trait for high cholesterol is specified by a dominant allele designatedHC, whereas the wild-type allele for normal cholesterol levels is designated hc.Black fur is specified by a recessive allele designated bl, whereas the wild-typeallele which gives brown fur is designated BL. The genes for both of these traitsare 30cM apart on the same autosome. A brown female (#1) with high cholesterolis mated to a black male (#2) with normal cholesterol. The progeny from this crossinclude a brown male (#3) with high cholesterol and a black female (#4) withnormal cholesterol. Mouse #3 is mated to a brown female (#5) with normalcholesterol. If 4 mice are produced from this cross, what is the probability that all 4will have brown fur?Consider the following three autosomal recessive mutations in Drosophila:vestigial wings (v); wild type is long (v+)black body color (b); wildtype is gray (b+)plum eyes (p); wildtype is red (p+)A vestigal, gray, red female (homozygous for all three genes) is crossed with a long wing, black, plum male (homozygous for all three genes). The F1 female progeny are mated with triple homozygous recessive males. Here is the phenotypic data for the F2 progeny:vestigal; gray; red 580long wings; black; plum 592vestigal; black; red 45long; gray; plum 40vestigal; black; plum 89long; gray; red 94vestigal; gray; plum 3long; black; red 5A total of 1448 progeny were counted.Which one of the following values is the approximate distance between the plum eye color and black body color loci?