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: 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: 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: A cross in Drosophila melanogaster involved the recessive X-linked genes for white eye (w), yellow…

A: The genotype expressed by most number of offspring is the parental genotype. Here, + y + and w + ct…

Q: When Thomas Hunt Morgan crossed his red-eyed F1 generation flies to each other, the F2 generation…

A: The result observed by Thomas Hunt Morgan, where all the white-eyed flies in the F2 generation were…

Q: What are the expected phenotypic ratios in the F, generation? If one of the F, males is mated to an…

A: The cross is between red bar-eyed female and purple normal eyed male. The genotype of the female is…

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: In a haploid yeast strain, eight recessive mutationswere found that resulted in a requirement for…

A: A rapid change in the sequence of DNA (deoxyribonucleic acid) due to physical or chemical factors is…

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: 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: 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,…

Q: The mutant FMR-1 allele that causes fragile X syndrome is considered to be X-linked dominant…

A: Fragile X syndrome is a genetic disorder. It causes various developmental disorders that include…

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: 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: None

A: Genotype and Phenotype of Parents:Male (osk-/osk-): This male has two mutant alleles of the oskar…

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: In Drosophila melanogaster, ebony body color is determined by the e allele. The e+ allele produces…

A: In an incomplete dominance neither of the two alleles express themselves in a heterozygous…

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: In Drosophila, a cross (cross 1) was made between twomutant flies, one homozygous for the recessive…

A: Homozygous organisms are those that have two identical alleles. These can either be dominant or…

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: Duchenne muscular dystrophy (DMD) is caused bya recessive mutant allele of an X-linked gene…

A: Duchenne muscular dystrophy (DMD) is a progressive form of muscular dystrophy that results in muscle…

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: 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…