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
- 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 following genotypes of two independently assorting autosomal genes determine coat color in rats:A-B- (gray); A-bb (yellow); aaB-(black); aabb (cream)A third gene pair on a separate autosome determines whetherany color will be produced. The CC and Cc genotypes allow coloraccording to the expression of the A and B alleles. However,the cc genotype results in albino rats regardless of the A and Balleles present. Determine the F1 phenotypic ratio of the followingcrosses: (a)AAbbCC * aaBBcc; (b) AaBBcc * AABbcc;(c) AaBbCc * AaBbcc.Vermillion eye color in Drosophila sp. is a sex-linked recessive trait. What phenotype would be found in this progeny of a cross between a vermillion female and a wild type male?
- 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?In Drosophila, a heterozygous female for the X-linkedrecessive traits a, b, and c was crossed to a male that phenotypically expressed a, b, and c. The offspring occurred inthe following phenotypic ratios.+ b c 460a + + 450a b c 32+ + + 38a + c 11+ b + 9 No other phenotypes were observed.(a) What is the genotypic arrangement of the alleles ofthese genes on the X chromosome of the female?In Drosophila, a heterozygous female for the X-linkedrecessive traits a, b, and c was crossed to a male that phenotypically expressed a, b, and c. The offspring occurred inthe following phenotypic ratios.+ b c 460a + + 450a b c 32+ + + 38a + c 11+ b + 9 No other phenotypes were observed.(a) What progeny phenotypes are missing? Why?
- Black body (b) and purple eye (pr) are recessive autosomal mutations in Drosophila. Bridges are crossed b/b females with pr/pr males and in the F2 observed 684 wild type, 371 black-bodied, and 300 purple-eyed flies. Do these results indicate that the b and pr genes are closely linked? Explain. (Remember that there is no crossing-over in male Drosophila)..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.A maternal effect gene in Drosophila, called torso, occurs as a functionalallele (torso+) and a nonfunctional, recessive allele (torso−)that prevents the correct development of anterior- and posterior-moststructures. A wild-type male (torso+torso+) is crossed to a female ofunknown genotype. This cross produces offspring (larva) that are allmissing their anterior- and posterior-most structures and therefore die during early development. What are the genotype and the phenotypeof the female fly in this cross? What are the genotypes andphenotypes of the female fly’s parents?
- Male Drosophila expressing the autosomal recessivemutations sc (scute), ec (echinus), cv (crossveinless),and b (black) were crossed to phenotypically wildtype females, and the 3288 progeny listed wereobtained. (Only mutant traits are noted.)653 black, scute, echinus, crossveinless670 scute, echinus, crossveinless675 wild type655 black71 black, scute73 scute73 black, echinus, crossveinless74 echinus, crossveinless87 black, scute, echinus84 scute, echinus86 black, crossveinless83 crossveinless1 black, scute, crossveinless1 scute, crossveinless1 black, echinus1 echinusa. Diagram the genotype of the female parent.b. Map these loci.c. Do the data provide evidence of interference?Justify your answer with numbers.Miniature wings (Xm) in Drosophila result from an X-linked allele that is recessive to the allele for long wings (X*). Give the genotypes of the parents in the following cross: Male parent Female parent Male offspring Female offspring Long Miniature 750 miniature 761 long O male: X* / X* and female X™ /x+ O male: X*/Xt and female Xm /xm O male: X*/ Y and female Xm /xm O male: Xm/ Y and female Xm /xmIn Drosophila, the X-linked recessive mutation vermilion (v) causes bright red eyes, in contrast to the brick-red eyes of wild type. A separate autosomal recessive mutation, suppressor of vermilion (su-v), causes flies homozygous or hemizygous for v to have wildtype eyes. In the absence of vermilion alleles, su-v has no effect on eye color. Determine the F1 and F2 phenotypic ratios from a cross between a female with wild-type alleles at the vermilion locus, but who is homozygous for su-v, with a vermilion male who has wildtype alleles at the su-v locus