Imagine that you set up a three-point mapping cross to determine the order of three X-linked genes. You have recessive mutations available for all three genes: yellow, white, and echinus. A heterozygous F1 Drosophila female is crossed to hemizygous mutant male. The observed numbers and phenotypes of F2 are as follows. 4685 yellow, white, echinus 4759 wild type 80 yellow 70 white, echinus 193 yellow, white 207 Echinus 3yellow, echinus 3white Based on this data which of the above phenotypic classes represent the double crossing over?

Q: n a certain plant, the dominant form of gene P codes for purple flowers while the recessive form…

A: Gregor Mendel discovered the fundamental doctrines of inheritance through his study of pea plants.…

Q: In fruit flies, you are mapping three genes in a three point cross. The mutants are hairy body (h),…

A: To determine gene order, we will compare parental and double crossover progenies.

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: Imagine Drosophila genes C, D, and E are autosomal genes located close to each other on the same…

A: If many genes are located on the same chromosome then the crossing over between them will be reduced…

Q: What is the type of inheritance? What is known of the genotype of the male in the above cross? What…

A: Introduction  Genetics is frequently used to refer to heredity, which is the passing on of genetic…

Q: A fruit fly that is heterozygous for the autosomal recessive mutations black (b) body, purple (pu)…

A: Formulas for three point test cross - A. Distance between two genes = (#progenies obtained by SCO…

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: 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: A geneticist is using a three-point testcross to map three linked Drosophila recessive mutations…

A: In our analysis of genetic mutations, it is imperative to calculate recombination frequencies to…

Q: Cross Cross A Cross A Cross B Cross B Phenotype F1 generation F2 generation F1…

A: The objective of the question is to determine the genotypes of the flies in different crosses and…

Q: Fruit flies express both normal wing shape and vestigial wing shape. The pedigree shows the…

A: Introduction :- Vestigial organs are organs that have no obvious function and are thought to be…

Q: It is assumed that in Drosophila the following genotypes produce phenotypes. َA- B- = Red color A-…

A: Genetics may be a discipline of biology concerned with the study of genes, genetic diversity, and…

Q: A Drosophila strain with two mutated phenotypes was crossed with a wild-type Drosophila strain. The…

A: Law of independent assortment state that two different allele assorts independent from one other.…

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: Bow-legs is hypothesized to be X-linked recessive trait in Drosophila melanogaster. The P1 virgin…

A: Introduction :- When the test statistic is chi-squared distributed under the null hypothesis, a…

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: A recessive mutation pd causes purple eyes in Drosophila, in contrast to the wildtype red eyes. A…

A: The objective of this question is to determine the proportion of offspring that will have purple…

Q: Parent Cross: Blue-Eyed Male x Normal Female Blue-Eyed Female F1 Offspring Normal Male Normal Female…

A: Drosophila melanogaster. The position of the white eye gene, positioned at the x-chromosome of this…

Q: Two different genes control the expression of kernel colour in Mexican black corn: black pigment…

A: Introduction :  Genetic traits are passed down through inheritance from parents to their offspring,…

Q: Male Drosophila from a true-breeding wild-type stock were irradiated with X-rays and then mated with…

A: J. Muller first showed in his experiment that exposure to certain dose of X-rays higher than the…

Q: In the fruit fly, Drosophila melanogaster, eye color is affected by an X-linked gene with two…

A: The objective of this question is to predict the phenotypes of the F1 and F2 generations in a cross…

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: 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: 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: In Drosophila, a female with three recessive traits, miniature wings, (m), ebony body (e) and rough…

A: This question is about a genetic problem involving the inheritance of traits in Drosophila flies.…

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: 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: The miniature gene in Drosophila is located on the X-chromosome, It has two alleles; the mutant…

A: The correct answer is option (a) i.e. Xm-/Y.

Q: A) Calculate the map distance separating the three genes B) Which gene is in the middle?

A: Symbol  white eyes = r short wings = l  ebony bodies = g    red eyes = R long wings = L  Gray bodies…

Q: In corn, the genes that determine seed color and coat are both located on chromosome 9.  Seed color…

A: This analysis of a corn dihybrid cross revealed that seed color and coat texture are controlled by…

Q: QUESTION 11 The location of five deletions have been mapped to a Drosophila chromosome, as shown in…

A: To determine the order of the genes (a-e) on the chromosome, we can analyze the complementation…

Q: In Drosophila, females heterozygous for the recessive alleles c, d, and e were crossed to males…

A: To determine the arrangement of the alleles in the heterozygous females, you need to consider the…

Q: In the mapping example in Fig 2, the dominant alleles were on one chromosome and the recessive…

A: Genetics is the study of inheritance and heredity. Alleles are the different forms of a gene. Allele…

Angiosperm Reproduction

The process of sexual reproduction in flowering plants is known as angiosperm reproduction. In flowering plants, reproduction begins with pollination, or the transfer of male gametes (pollen) from the male reproductive organ (anther) to the female reproductive organ (pistil), and ends with fertilization of the female gametes (egg), which produces a zygote, which then grows to become a mature plant.