Fine spines (s), smooth fruit (tu), and uniform fruit color (u) are three recessive traits in cucumbers. A cucumber plant heterozygous for all three traits is used in a test cross, and the following progeny are produced from this test cross. Type Number SU TU su Tu Su Tu su tu SU tu s U tu SU TU Sutu TOTAL 2 70 21 4 82 21 13 17 230 Identify the order of the genes on the chromosome:

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

A: Introduction :- D. melanogaster is an ideal model organism due to a variety of characteristics. The…

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: Given the following information, determine the inheritance of flower color in this plant and…

A: The first set of parents is called the “parental generation” (P). All the offspring generated by…

Q: Females heterozygous for the recessive second chromosome mutations px, sp, and cn are mated to a…

A: Females heterozygous for the recessive second chromosome mutations px, sp, and cn are mated to a…

Q: Two unlinked genes, A and B, encode very similar enzymes involved in the production of purple flower…

A: In the given context, there are two independent genes, denoted as A and B, which are responsible for…

Q: In sweet peas, gene C or P alone produces white flowers, the purple colour being due to the presence…

A: Dominance is a physiological influence on the same gene locus by an allele over its partner allele.…

Q: Two corn plants are studied. One is resistant (R) and the other is susceptible (S) to a certain…

A: Maize, often known as corn in North American and Australian English, is a cereal grain that was…

Q: Explain why dead females are never found in the F1 generation no matter which parents are crossed.

A: Sex- linked traits: In an XY chromosomal system of sex determination ,both X and Y chromosomes are…

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: 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: A certain plant has 3 un-linked gene pairs, which can be represented as AaBbCc. Upon…

A: punnet square is used to calculate the probability of the offspring from the gamates provides.…

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: The predicted outcome of the F1 cross is diagrammed in the Punnett square shown in the figure, where…

A: option (b) 1,2,3 have dark leaves.

Q: Colored aleurone in the kernels of corn is due to the dominant allele R. The recessive allele r,…

A: Genomics can be defined as the study of the whole genome of an individual. Genomics uses the…

Q: A strain of plants has a mean height of 24 cmcm. A second strain of the same species from a…

A: The above problem mentions one plant of twelve cm and another plant of thirty-six cm. Therefore an…

Q: The non-wild-type alleles are k (clipped wings), l (long tail), and m (magical powers). The parental…

A: Here the test cross that produced 1572 offspring was conducted between k/k+  l/l+  m/m+…

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: A certain species of morning glories produces flowers that are blue, red, or purple. Two…

A: The information given in the question implies to recessive epistasis. In recessive epistasis…

Q: The alleles his-5 and lys-1, found in yeast, result in cells that require histidine and lysine for…

A: a) In tetrad analysis, three types of tetrads are obtained:    Tetratypes= T = 363    Non-parental…

Q: In corn, the allele f ′ causes floury endosperm and the allele f ″ causes flinty endosperm. In the…

A: First, examine the crosses and also the ensuing genotypes of theendosperm:

Q: Waxy endosperm (wx), shrunken endosperm (sh), and yellow seedlings (v) are encoded by three…

A: Always recombinant genotypes are less in number than the non-recombinant genotypes.   Hence, the…

Q: In Drosophila, singed bristles (sn) and cut wings (ct) are both caused by recessive, X-linked…

A: Introduction :- There are two sets of chromosomes in humans. Allele pairings are categorised using…

Q: Consider three genes L, U, and W, for which the count of F2 phenotypes after a 3-point cross is as…

A: The parent gametes would be having the highest frequency thus they are IUW and Luw. The gametes…

Q: An ear of corn has a total of 381 grains, including 216 Purple & Smooth, 79 Purple & Shrunken, 65…

A: Answer: DIHYBRID CROSS = It is a cross between two traits of a same species reproducing progeny at…

Q: Consider the following cross examining four gene in two parental line: Parent 1: A/a; B/B; D/d; E/e…

A: This is a tetrahybrid cross, meaning a cross involving study of four different genes. The number of…

Q: In Drosophila fruit flies, the genes for warped wings (dwp), rumpled bristles (rmp), and pallid…

A: Three point test cross data is given in the question. The three genes are involved in this cross.

Q: An individual heterozygous for d e f (D/d E/e F/f) was crossed to a homozygous recessive individual…

A: DNA is present inside the nucleus of the cell. The genes are located on the DNA. The genes consist…

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: A homozygous fly with two recessive mutations causing purple body and short wings (ppss) is mated…

A: Introduction :  Haplotype refers to a group of HLA genes found on a certain chromosome. These genes…

Q: Let S and s be the alleles for seed shape (spherical and wrinkled, respectively) in garden peas.…

A: Trait is a characteristic feature that is unique to a specific individual. Each trait is represented…

Q: A standard three-point mapping is conducted for recessive mutations in autosomal genes purple eye…

A: Chromosome mapping first introduce the great scientist T.H. Morgan. By the help of recombinant…

Q: You have already localized the genes to the same chromosome by deletion mapping, and now decide that…

A: A test cross is one that involves cross between an individual (with unknown genotype) with a…

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: Below is the linkage map for genes y, sh and c that are in cis arrangement. Interference is 0.4 and…

A: The cis arrangements of genes on a chromosome mean that all the dominant genes are on one chromosome…

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.