In Drosophila melanogaster, forked bristles are caused by an allele (Xf) that is X linked and recessive to an allele for normal bristles (X+). Brown eyes are caused by an allele (b) that is autosomal and recessive to an allele for red eyes (b +). A female fly that is homozygous for normal bristles and red eyes mates with a male fly that has forked bristles and brown eyes. The F1 are intercrossed to produce the F2. What will be the phenotypes and proportions of the F2 flies from this cross?

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

A: Gene mapping is a process through which scientists can evaluate the presence and position of genes…

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: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: You have a Drosophila line that is homozygous for autosomal recessive alleles a, b, and c, linked…

A: The Recombinant Frequency tells us about the percentage of or the proportion of recombinants present…

Q: In human beings, the gene for red‑green colorblindness (r) is sex‑linked and recessive to its allele…

A: normal vision male =XR Ycolor blind male= XrYnormal vision female= XR XRcolorblind female =Xr Xr…

Q: Eye color in Drosophila is determined by a gene is on the X chromosome, with the red-eye allele…

A: Each gene possesses two forms of alleles. These forms include a dominant allele and a recessive…

Q: In Drosophila, the gene for wing type is known to be autosomal with vestigial wings (vg) known to…

A: Vestigial wings are those which does not help in flying. They possess defected vestigial gene on the…

Q: In Drosophila, the following genes and mutations are known: Wingsize – recessive allele for tiny…

A:

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: In Drosophila, an autosomal gene determines the shape of the hair, with B giving straight and b…

A: Drosophila melanogaster is also known as fruit flies

Q: The Drosophila fruit fly genes ebony (e) and claret (ca) are linked on chromosome 3. In Drosophila,…

A: Given that, the genes of the Drosophila fruit fly ebony and claret are linked on chromosome 3. The…

Q: In Drosophila, the following genes and mutations are known: Wing size – recessive allele for tiny…

A: The genotype means the genetic makeup of organisms while phenotype is the physical appearance of the…

Q: Black body (b) and purple eye (pr) are recessive autosomal mutations in Drosophila. Bridges are…

A: b - allele for black body - recessive pr - allele for purple eye - recessive B - wild type for body…

Q: A recessive maternal effect mutant in zebrafish, called ichabod, results in embryos lacking heads…

A: Maternal effect in zebrafish is a situation where the phenotype of an organism is determined not…

Q: eye color is determined by a recessive allele, v, of an X-linked gene. The wildtype color is…

A: Eye color in Drosophila is an example of a X-linked trait: In Drosophila, the gene for eye color is…

Q: Color blindness in humans is controlled by an X-linked completely recessive allele (Xc), while…

A: Introduction :- Color blindness (colour vision deficit) is a condition in which a person's ability…

Q: White eyes is a Drosophila phenotype that is linked to a mutant, recessive, X- inked allele.…

A: Sex-linked(X-linked) inheritance is a type of criss-cross inheritance, where the traits from the…

Q: The diagrams represent two human somatic cells, one from a female and one from a male, and the…

A: Dominant traits - Brown hair (B) and Brown eyes (E) Recessive traits - blond hair (b) and blue eyes…

Q: Imagine that two unlinked autosomal genes with simple dominance code in goats for size, where L is…

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

Q: Vermillion eye color in Drosophila is a sex-linked recessive trait. What phenotype would be found in…

A:

Q: n Drosophila, gray body color is dominant over ebony body color, while long wings are dominant over…

A: answer is given below...

Q: A cross was performed using Drosophila melanogaster involving a female known to be heterozygous for…

A: An organism has phenotype and genotype. Phenotype is the observable characteristics and genotype is…

Q: cats, a sex-linked recessive allele, d, results in dystrophin-deficient muscular dystrophy. Its…

A: In this case mother would be heterozygous for polydactyly because she transfer f  allele to male…

Q: In an insect species, the genes for white eyes (w) and smooth legs (s) are linked and are located 16…

A: In genetics, genes forms the hereditary units of life. The genes contains two alternative forms…

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 Drosophila, gray body color is dominant to ebony body color, while long wings are dominant to…

A: Drosophila study experiments Gray body colour - dominant -E Ebony body colour- recessive- e long…

Q: In fruit flies (Drosophila melanogaster), the bn+ allele for normal dull red eyes is dominant to the…

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

Q: In Drosophila melanogaster, white eyes (w) is an X-linked recessive mutation. Normal eyes are red…

A: Inheritance is defined as the passing of genetic inheritance from parental to next generation.

Q: You have a Drosophila line that is homozygous for autosomal recessive alleles a, b, and c, linked in…

A: Recombination frequency measures the genetic linkage between a set of alleles/genes and is used to…

Q: In the fruit fly, Drosophila melanogaster, a spineless (no wing bristles) female fly is mated to a…

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

Q: In Drosophila, the genes ct(cut wing margin), y (yellow body), and v (vermilion eye color) are…

A: Crossing over of chromosome during meiosis is normal process occurring so that there can be…

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: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…

A: The initial step is to decide the request for the three genes.This should be possible by assessing…

Q: Vermillion eye color in Drosophila sp. is a sex-linked recessive trait. What  phenotype would be…

A: Considering XvXV as  Vermilion eye coloured female the crossing is given as follows. The phenotype…

Q: Consider the following three autosomal recessive mutations in Drosophila: vestigial wings (v); wild…

A: Three point test cross is given in the question. The F2 progenies is used to find the middle gene.

Q: In Drosophila, sepia colored eyes are due to a recessive allele s and red eyes are due to a dominant…

A: The study of heredity and variation is called genetics. The basic principles of genetics were…

Q: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…

A: Inheritance or heredity is passing-on one trait from the parents to the progeny by either asexual or…

Q: In the fruit fly Drosophila, a rudimentary wing called vestigial and the dark body color called…

A: This species is used because of its small size,short generation time and ability of females to lay a…

Q: In Drosophila, the recessive allele for forked bristles is X-linked, and the recessive allele for…

A: In a dihybrid cross, a pattern of inheritance of two different characteristics can be understood. To…

Q: Consider three autosomal genes (A, B and D) present in a hypothetical species. The a allele results…

A:

Q: In Drosophila flies, the allele b gives a black body, and the allele b+ gives brown, the wild-type…

A: Genes are the hereditary units of life. The genes can be linked or may not be linked.  When two…

Q: In Drosophila, gray body color is dominant to ebony body color, while long wings are dominant to…

A: Genotype is defined as the complete set of genes present in the individual and the information of…

Q: Miniature wings in Drosophila melanogaster are due to an X-linked gene (Xm) that is recessive to an…

A: It is given that alleles for the trait for miniature wings (Xm) in Drosophila melanogaster are…

Q: Drosophila melanogaster body color is controlled by one gene while wing shape is controlled by a…

A: Mendel's law of independent assortment states that the alleles of two  different genes get sorted…

Q: Vermilion eye color in Drosophila is sex-linked and recessive. What would be the phenotypes of male…

A: Vermilion eye color in Drosophila is a sex-linked and recessive characteristic.  This sex-linked…

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

A: If the X chromosome is to autosome pair ratio in the Drosophila is 1, the fly would be female. If…

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

A: Mapping deals with sequence, in which genes appear on a chromosome and their distance apart. Mapping…

Q: In the fruit fly Drosophila melanogaster, the following genes and mutations are known:Wing size:…

A: Gene: Genes are genetic material that passes from parents to progeny. The dominant allele can…

Q: The dominant form of Enzyme 1 makes blue pigment. However, individuals with this allele only have…

A: The mode of inheritance is a pattern of obtaining parentral alleles  or genes to the offsprings. The…

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.