Let’s suppose that a gene affecting pigmentation is found on the Xchromosome (in mammals or insects) or the Z chromosome (in birds)but not on the Y or W chromosome. It is found on an autosome inbees. This gene exists in two alleles: D (dark) is dominant to d (light).What would be the phenotypic results of crosses between true-breedingdark females and true-breeding light males, and the reciprocal crossesinvolving true-breeding light females and true-breeding dark males,in the following species? Refer back to Figures 4.1 and 4.2 for themechanism of sex determination in these species.A. BirdsB. Fruit fliesC. BeesD. Humans

Q: In mice, the green eye gene (g) are on the same chromosome as the long tail gene (1). The dominant…

A: Introduction :  Recombination is the process by which a segment of DNA recombines to create a new…

Q: The Hairless phenotype in Drosophila is caused by a recessive mutation in the H gene. Wild-type…

A: Gregor Mendel was an Austrian scientist and biologist who proposed laws of inheritance and these…

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: 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: In fruit flies, the autosomal recessive mutation pr causes brown eyes whereas the cn mutation causes…

A: A genetic characteristic or disease can be handed down from one parent to the next through autosomal…

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

A: Introduction: Drosophila melanogaster is a species of fly in the family Drosophilidae. The species…

Q: Let’s say there is an organism with two pairs of alleles, W/w and Z/z, each pair is located on a…

A: Cell is the basic structural and functional unit of life. Group of cells is known as tissue.

Q: In currant moths, their Light color is sex-linked and recessive (d) to dark color (D). Question:…

A: In genetics, The sex linked inheritance is a type of inheritance pattern in which sex chromosome X…

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: In rice, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the…

A: For a variety of reasons, using male sterility decreases the cost of hybrid seed production. It…

Q: What gamete must be donated by the father monster, and what is its probability? a) g l — 12.5% b) g…

A: Gametes are produced by the process of meiosis.

Q: A common kind of red-green blindness in humans is caused by the presence of a sex-linked recessive…

A: A recessive sex-linked disease is a genetic disorder caused by a recessive allele located on the sex…

Q: In Drosophila the genes forked bristles (f and f+) and vermilion eyes (v and v+) are ~24 m.u.  apart…

A: During meiosis, genes between homologous chromosomes are transferred in genetic recombination, which…

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: Draw a Punnett square for the dihybrid cross. There are two known alleles of gene occupying a…

A: Dihybrid cross involves two genes in a cross. That's why the two traits are involved in this cross.

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 jellyfish, let's say that long tentacles are produced by a sex-influenced allele that is dominant…

A: Given information In jellyfish, long tentacles are produced by a sex-influenced allele. The allele…

Q: owl, barring (B) is sex-linked and dominant, the recessive allele (b) producing solid black color…

A: Sex linked character is usually present on the sex chromosomes which are either in the form of x or…

Q: In the pedigree below, male II-1 has Klinefelter syndrome, which is the result of an XXY karyotype.…

A: Klinefelters syndrome occurs when an abnormal XY sperm fertilizes a normal X egg, or a normal Y…

Q: locus. The allele for brown eye color is dominant to the allele for brick red eye color and to the…

A:

Q: In flies, long wings are a dominant trait, and short wings are a recessive trait. Medium wings are…

A: Homozygous individuals mean there is a pairing of the two same types of alleles and both of the…

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: In fruit flies, normal wings (G) are dominant to glossy wings (g) and red eyes (R) are dominant to…

A: Phenotypic expression seen in organisms are shown by genes. Most genes have two alleles and the…

Q: In fruit flies, ken– is the mutant allele of a gene and ken+ is the wild-type allele. vg- is the…

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

Q: Forked bristles, miniature wings, and sable bodies are all homozygous recessive traits whose genes…

A: In genetics when two to three genes are present I the same chromosomes, it is termed as linked…

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: 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: Sex determination in birds is different from that in humans. The sex chromosomes in birds are called…

A: Sex ratio is defined as the ratio of males and females in the population. Generally in sexually…

Q: Forked bristles, miniature wings, and sable bodies are all homozygous recessive traits whose genes…

A: According to the answering guidelines, I'm going to answer 1st 2 part (A, B ) only. For the answer…

Q: In humans, the mic2 gene (involved in antibody production) is found on sex chromosomes and has…

A: The pseudoautosomal inheritance is observed for the allele in the identical regions of X and Y…

Q: Three enzymes are part of a sequential pathway that produces a pigment that makes flowers red.  Each…

A: Question -Three enzymes are part of a sequential pathway that produces a pigment that makes flowers…

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

A:

Q: Two autosomal genes controlling beak shape in finches are 18 cM apart on the same chromosome. Pointy…

A: In this instance, we are researching how two autosomal genes influence the beak morphology of…

Q: In corn, pigmented aleurone (R) is dominant to colorless aleurone (r), and green plant color (G) is…

A: Given  Green (G) is dominant over yellow (g)  Pigment (R) is dominant colourless (r)  Plant one…

Q: In C. elegans, lon-2 and unc-2 are recessive mutations that are 8 map units apart on the X…

A: A map unit is defined as the distance between two linked gene pairs where 1% of the products of…

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: 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…

Q: In Drosophila, an X-linked recessive mutation, Xm causes miniature wings. List the F2 phenotypic…

A: Inheritance patterns are broadly of two types :- autosomal and sex-linked. They are further of two…

Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.