In Drosophila, M. Green found a singed allele (sn) withsome unusual characteristics. Females homozygous forthis X-linked allele have singed bristles, but they havenumerous patches of sn+ (wild-type) bristles on theirheads, thoraxes, and abdomens. When these flies aremated with sn males, some females give only singedprogeny, but others give both singed and wild-type progeny in variable proportions. Explain these results.

Q: Mitotic recombination can occasionally produce a twin spot.Let’s suppose an animal species is…

A: It is given to suppose that if an animal species is heterozygous for the 2 gene governing fur colour…

Q: BLACK VESTIGIAL DIHYBRID TESTCROSS In the parental generation, you mate a pure-breeding wild-type…

A: If the genes are located on the same chromosome then they are classified as linked genes. In this…

Q: You discover a new X-linked mutation for antenna shape in Drosophila (fruit flies) which produces…

A: Correct option is (b) 0       Step 1:  The Drosophila has been  X linked mutation which can…

Q: A Drosophila embryo dies during early embryogenesis due to arecessive allele of a maternal effect…

A: Phenotypes and genotypes represents the traits that gets passed on from the parents to the progeny.…

Q: In the model plant Arabidopsis thaliana, the following alleles were used in a cross: T = presence of…

A: a) To find: The appearance of the F1

Q: Cinnabar eyes (cn) and reduced bristles (rd) are linked autosomal recesive characters in Drosophila…

A: According to the question, The given cross is, cn+cn+rd+rd+ (wild type female) X   cncnrdrd (reduced…

Q: der(X) der(22) 22 der(X) 22 der(X) 22 First row is mother, second row is first daughter, third row…

A: The terminology "phenotype" describes an organism's visible physical features, such as its…

Q: A heterozygous diploid yeast Aa Bb went through meiosis. What percentage of the haploid spores will…

A: Recombination is defined as the process or method by which the DNA pieces are broken down and are…

Q: Let’s suppose that you have made a karyotype of a female fruit flywith red eyes and found that it…

A: As per question, there are three different eye colors X-linked alleles prevailing in the population…

Q: A gene involved with body colour in this species of fruit fly is located on the non-homologous…

A: The Gene for Eye Color in Drosophila: Red vs. BrownIntroductionThis species of fruit fly possesses a…

Q: in Drosophila, the gene w specifies eye color. Widy pe allele w+ gives red eyes and is dominant me…

A: Note - “Since you have posted multiple questions, we will provide the solution only to the specified…

Q: In Drosophila, a female fly is heterozygous for three mutations, Bar eyes (B), miniature wings (m),…

A: In terms of genetics and genomics, linkage describes how closely genes or other DNA sequences are…

Q: The genetic map was based on crosses in Drosophila involving the three sex-linked genes a, b and c.…

A: A linkage map is a map based on the frequencies of recombination between markers during crossover of…

Q: What gametes, and in what frequencies, are produced by a female Drosophila of genotype A B / a b…

A: Drosophila, sometimes known as fruit flies, has been used as a model organism in genetic study for…

Q: A mutation of Drosophila has a wing condition known as beaded. When a beaded fly was crossed with a…

A: The wildtype flies have long and full wings. The mutated flies have beaded wings that can be due to…

Q: The production of eye-color pigment in Drosophila requires the dominant allele A. The dominant…

A: P   red-eye female X white-eye male F1 purple-eyed females        and       red-eyed males…

Q: Drosophila females of wild-type appearance but heterozygous for three autosomal genes are mated with…

A: Let us represent the alleles responsible for wildtype eyes, wildtype bodies, and wildtype thoraxes…

Q: the white-eyed w+ gene from one end of the X chromosome locus (w) moves the to a location nearer to…

A: This is an example of epigenetic modification. It alters the gene expression pattern.

Q: The balancer chromosome includes GFP and a mutation in gene X that causes flies to be sterile in the…

A: A homozygous mutation is one that affects both the paternal and maternal alleles. Compound…

Q: A man heterozygous at both the locus for PTC tasting and at the locus for albinism marries an albino…

A: Genotype of the man : PpAa  PP/Pp : PTC taster  pp : nontaster  AA/Aa : Normal pigmentation  aa:…

Q: Female flies with white eyes and miniature wings (both X-linkedrecessive traits) were crossed to…

A: Chromosomal composition of these rare females will be – XXY. Both the X chromosomes must be coming…

Q: In Neurospora, his2 mutants require the amino acidhistidine for growth, and lys4 mutants require…

A: Neurospora is a type of a fungus that has axon like striations on its spores. The spores of the…

Q: A pure-breeding strain of squash that produced diskshaped fruits (see the accompanying illustration)…

A: P:                   Long shaped fruit (true)         X            disc-shaped fruit (true)…

Q: PURPLE VESTIGIAL DIHYBRID CROSS In the parental generation, you mate a pure-breeding wild-type…

A: Introduction  A dihybrid cross is made up of two individuals who have two features that are…

Q: DRAW IT Suppose, as in the questionat the bottom of Figure 15.9, the parental(P generation) flies…

A: Consider the following V= Normal wing v= Vestigial wing G= Gray body-color g= Black body-color Then,…

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A: The DNA (deoxyribonucleic acid) is the genetic material that is inherited from the parents by 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: You are given a Drosophila female that looks wild-type but is heterozygous for mutations in tan body…

A: Three-point cross: In genetics, the three-point cross is used to determine the distance between two…

Q: PURPLE VESTIGIAL DIHYBRID TESTCROSS In the parental generation, you mate a pure-breeding wild-type…

A: Recombination frequency is the number of organisms that are produced from a genetic cross. The…

Q: Drosophila can have a yellow-brown body (wild-type [+]) or a black body [b] as a result of a…

A: Only wild-type Drosophila for both features, [+, +], were present in the F1 progeny of the initial…

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: Drosophila females heterozygous for 3 recessive mutations a, b, and c were crossed to males…

A: The given cross involves Drosophila females that carry three recessive mutations (a, b, and c) in…

Q: Given two strains of autotetraploid plants  AAaa – in this plant the gene is close to the…

A: For AAaa gametes in F2 generation would be Aa and Aa . Genotypic ratio - 1:2:1 phenotypic ratio- 3:1…

Q: You are an allele on a single uncondensed chromosome in a Yellowfever-carrying mosquito (Aedes…

A: The fundamental and active process by which a parent cell after replication of its components,…

Q: Assuming two independently assorting gene loci for eye color and wing length in Drosophila…

A: A dihybrid cross is a type of cross in which two traits are involved .  As per the question , two…

Q: Drosophila can have a yellow-brown body (wild-type [+]) or a black body [b] as a result of a…

A: Drosophila species are small flies & typically pale yellow to reddish brown to black, with red…

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: A fruit fly was found to be heterozygous for a paracentric inversion. However, obtaining flies that…

A: A paracentric inversion is a type of chromosomal aberration characterized by an inverted segment of…

Q: One form of male sterility in corn is maternally transmitted. Plants of a male-sterile line crossed…

A: Genetics or hereditary qualities is the investigation of genes and heredity of how certain…

Q: The following corn loci are on one arm of chromosome9 in the order indicated (the distances between…

A: Introduction A phenotype is a set of observable characteristics about an individual, such as height,…

Q: In Drosophila, the gene eyeless (ey) is on the fourth chromosome, and four wings (fw) and legs for…

A: Drosophila, also known as fruit flies, is a commonly used organism in genetic research due to its…

Q: In the fruit fly, dumpy wings (d) and purple eyes (p) are encoded by mutant alleles that are…

A: The two genes are involved in this case. The wings and eye encoding genes are involved here. The…