Two fruit flies (Drosophila melanogaster) were crossed. The cross was between a homozygous red-eyed, wingless female and a white-eyed male heterozygous for wings. Recall that red eyes (R) is dominant over white eyes (r) and is inherited on the X chromosome (sex-linked) and as such, eye colour alleles should be written as superscript. In addition, the autosomal trait wings (W) is dominant over wingless (w). 1. List the female genotype 2. List the male genotype 3. Construct a Punnett Square for this dihybrid cross on a piece of paper, to determine what the offspring of such a cross would be with respect to sex, eye colour & wings. 4. Using the information from your Punnett Square answer the following: a. What genotypes did you get (list all genotype combinations; if you have more than one of the same kind, you do NOT have to re-list it.) b. What are the phenotypic ratios of the offspring with respect to sex, eye colour and wings?

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

A: The normal eyes are red in Drosophila melanogaster. Normal red eyes are represented by W. Whereas,…

Q: Three autosomal genes are linked along the same chromosome.The distance between gene A and B is 7…

A: Genetic mapping is a method which considers the recombination frequency as a measure of distance…

Q: cance of color blindness in humans is due to a recessive gene located on the X chromosome X linked).…

A: Mother     ×      father            XXc                  XcY Progeny -      X Xc Xc XXc…

Q: X-linked ichthyosis is an X-linked recessive trait that manifests in part as dry, scaly skin…

A: If one allele is missing it is hemizygous. Heterozygous is the presence of two different alleles at…

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: 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: The pedigree follows the inheritance of a relatively common trait.  Is the trait most likely…

A: A pedigree chart depicts the family members who are impacted by a genetic trait and a family tree.…

Q: Brachydactyly type D is human autosomal dominant condition in which the thumbs are abnormally short…

A: Brachydactyly type D is a genetic abnormality, which occurs due to a dominant gene mutation in the…

Q: The individuals with a certain disease are shown in this pedigree. The disease is caused by an…

A: By analyzing a pedigree, we can determine genotypes, identify phenotypes, and predict how a trait…

Q: Hair length of the fur in cats can be either short or long. The allele for short hair is dominant to…

A: Genetics is the scientific study of genes and heredity, or how certain characteristics are passed…

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: 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: 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 beetles, an X-linked gene determines body size, with normal size (M)completely dominant to…

A: A genetic cross is an experimental breeding process performed to understand the patterns of…

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: Two plants in a cross were each heterozygous for two gene pairs (AB /ab) whose loci are linked and…

A: Linkage is an exception to independent assortment. Distance between two genes = recombination…

Q: Two different female Drosophila were isolated, each heterozygous for the autosomally linked genes…

A: Crossing over refers to the exchange of genetic material in the germ line. During meiosis, the…

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

A: As per the guidelines, we are supposed to answer only three sub-parts. Kindly repost the question…

Q: (a) What pattern of transmission is most consistent with this pedigree? (1) autosomal recessive, (2)…

A: Pedigree  A family tree or chart that represents a person's genetic family history by symbols and…

Q: In Drosophila melanogaster, forked bristles are caused by an allele (Xf) that is X linked and…

A: The forked bristles in Drosophila menalogaster is due to the presence of Xf alleles in homozygous…

Q: In the snail Cepaea nemoralis, an autosomal allele causing a banded shell (BB) is recessive to the…

A: Genetic linkage: - when genes are far apart or on the different chromosomes they are said to be…

Q: Suppose a man is heterozygous for heterochromia, an autosomal dominant disorder which causes two…

A: Chi-square is a statistical method used to assess whether observed data deviates significantly from…

Q: What features of this pedigree indicate that the allele forDuchenne muscular dystrophy is X-linked?

A: Duchenne muscular dystrophy (DMD) is a severe genetic disorder. In this disease progressive muscle…

Q: What are the alleles in the parental gametes? What are the alleles in the double crossover gametes?…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: Dominant negative Incomplete dominance Epistasis Recessive lethal allele III E ||| A condition where…

A: Introduction :  The field of science known as genetics deals with the study of heredity, genetic…

Q: In the common daisy, genes A and B control flower color. Both genes have a dominant allele (A or B)…

A: Introduction A genotype is the collection of genes that makes up an individual. When information…

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: In the snail Cepaea nemoralis, an autosomal allele causing a banded shell (BB) is recessive to the…

A: Cepaea nemoralis is an air breathing species of land snail and also known as grove snail and brown…

Q: Drosophila females of wild-type appearance but heterozygous for three autosomal genes are mated with…

A: Let us represent the alleles responsible for wildtype eyes, wildtype bodies, and wildtype thoraxes…

Q: Raspberry eyes (ras) is a sex-linked recessive trait in Drosophila. Eyeless (ey) is an autosomal…

A: Within this particular cross:The male individual exhibits the wild-type phenotype, indicating that…

Q: Constructing and Using a Pedigree Duchenne's muscular dystrophy (DMD) is a well known, lethal…

A: A pedigree chart is a graphic that depicts the incidence and emergence of phenotypes of a gene or…

Q: Male Drosophila expressing the autosomal recessivemutations sc (scute), ec (echinus), cv…

A: Locus is the specific location of gene in a chromosome. The inheritance of two different characters…

Q: There are two traits not shown in the pedigree: albinism (autosomal recessive) and Marfan syndrome…

A: A pedigree chart is a graphic that depicts the incidence and emergence of phenotypes of a certain…

Q: X-linked recessive, Unaffected. father Carrier mother XY |Unaffected ] Affected ICarrier XY…

A: A gene is a sequence of nucleotides in genome that codes for a functioning molecule. There is…

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: In Drosophila melanogaster, ebony body (e) and rough eyes (ro) are encoded by autosomal recessive…

A: Drosophila melanogaster is a common fruit fly. It is most common subject used in majority of genetic…

Q: In Drosophila, a cross was made between a yellowbodied male with vestigial (not fully…

A: Genes can be defined as an important unit of inheritance. A pair of genes is called allele. These…

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: Gene interaction and Epistasis Dog ears may either be drooping or erect. In terms of their barking,…

A: Gregor Mendel was an Austrian scientist, mathematician, and biologist who proposed laws of…

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…

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.