In Drosophila, the gene eyeless (ey) is on the fourth chromosome, and four wings (fw) and legs for antennae (lfa) are both on the third chromosome 20 cM apart. Consider that mutations in all three genes each cause recessive phenotypes. What frequencies would you expect for the various phenotypes amongst the offspring of the test cross shown below (note that the comma separates alleles on the same chromosome, and the semicolon separates different chromosomes):

Q: In Drosophila, a fully heterozygous female with the X-linked recessive genes a, b, and c (not…

A: A fully heterozygous female with x linked gene a, b, c was mated with male a, b, c. Parental cross -…

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

A: Inheritance is defined as the process by which genetic information will be passed or transmitted…

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: Based on the same data from the previous question:   cu  jv  se        31 +   +   se       99…

A: In Drosophila, curled wings (cu), javelin bristles (jv) and sepia eyes (se) are autosomal recessive…

Q: In Drosophila, the sepia mutation (se, chromosome 3, position 26) results in dark brown eyes, while…

A: Suppose, se is the recessive mutated allele and it's wild type dominant form is se+ allele…

Q: In Drosophila, M. Green found a singed allele (sn) withsome unusual characteristics. Females…

A: Each gene in the DNA that is coding for a specific protein/trait has two variants called alleles.…

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

A: In Drosophila melanogaster , there as three types of genes :  A ) White eye ( w )  B ) Yellow body (…

Q: In German cockroaches, bulging eyes (bu) are recessive to normal eyes (bu+), and curved wings (cv)…

A: Answer is e.bu cv+

Q: In autotetraploid Chinese primrose (Primula sinensis L.), the gene controlling stigma color is very…

A: Blue colored flowers is because of the A alleles and slate colored flowers result from a alleles; G…

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 Drosophila, raspberry eyes (ras) is a sex-linked trait (X chromosome) and recessive. Polished…

A: Suppose, the allele P (dominant) is wild type eyes and allele p (recessive) is responsible for…

Q: In an autotetraploid organism, the gene controlling coat color is very near the centromere of the…

A: Autotetraploid Organisms --- Autotetraploidy -- It is defined as individual or strain whose…

Q: y ec +y ec w Determine the order in which th Occur on the chromosome and pr 7.22 A cross involving…

A:

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 rats, kinky hairs and long nose whiskers are produced in response to the recessive gene (k), and…

A: Mendelian genetics and probability are two interconnected areas of study that are essential in…

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: What is the genetic distance between the eye colour locus (w) and the bristle locus (sn)? answer in…

A: Introduction: Drosophila is a genus of small flies, commonly known as fruit flies. They belong to…

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: You are studying tail length in a species of mice, where some mice have long tails and some have…

A: Genetics is the study of genes, their interactions, and the effect of environment on genes. Broadly…

Q: Consider three genes on the same chromosome, Gene A, Gene B and Gene C. You perform three factor…

A: As 3 genes are located on the same chromosome then the crossing over event is very rare.

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: Genes X, Y, and Z are linked. Crossover gametes between genes X and Y are observed with a frequency…

A: When the fragments of the chromosomes are exchanged at two regions, the event is called a double…

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: Imagine that you set up a three-point mapping cross to determine the order of three X-linked genes.…

A: This is the case of three point test cross. The crossing over occurs between the heterozygous…

Q: Here are the results obtained by Bridges and Morgan for crossing over analysis between black,…

A: The complete map of genes in a chromosome is called as the genetic map. It is also called chromosome…

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 autotetraploid Chinese primrose (Primula sinensis L.), the gene controlling stigma color is very…

A: Autotetraploids are organisms that carry four copies of the same genome for example a homozygous…

Q: Vestigial wing is a recessive autosomal mutation in the fruit fly Drosophila melanogaster. Wild-type…

A: The alleles are the alternative forms of a gene that are located on the same locus of a homologous…

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: 1. Draw the pedigree for Amita's family and determine the mode of inheritance if any. 2. Explain how…

A: From the given data, it is clear that the disease is autosomal, not sex-linked. As if it was…

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: In Drosophila, two genes w and s are X-linked and are 25 map units apal. heterozygous female fly…

A:

Q: Miniature wings in Drosophila result from an X-linked allele (w) that is recessive to the allele for…

A: The allele for miniature wings is represented with w And the allele for long wings with + The allele…

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: In D. melanogaster, reduced bristles (rd), cinnabar eyes (cn), and vestigial wings (vg) are…

A: The tendency for DNA sequences that are close to one another on a chromosome to be passed down…

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.