A mouse from a true-breeding population with normal gait was crossed to a mouse displaying an oddgait called dancing. The F1 animals all showednormal gait.a. If dancing is caused by homozygosity for the recessive allele of a single gene, what proportion ofthe F2 mice should be dancers?b. If mice must be homozygous for recessive allelesof each of two different genes to have the dancing phenotype, what proportion of the F2 shouldbe dancers if the two genes are unlinked?(Assume that all the mice in the populationwith normal gait were homozygous fordominant alleles.)c. When the F2 mice were obtained, 42 normal and8 dancers were seen. Use the chi-square test todetermine if these results better fit the one-genemodel from part (a) or the two-gene model frompart (b).

Q: In a fungus with four ascospores, a mutant allele lys-5 causes the ascospores bearing that allele…

A: An ascus is a sac-like structure within an ascomycete fungi that contains ascospores. Ascospores are…

Q: Data set A summarizes F2 numbers from an F1 cross arising from two, true-breeding Drosophila strains…

A: a) Genetic hypothesis for each allele:Trait: Leg lengthHypothesis: Leg length is controlled by an…

Q: A. From the data given, determine if alleles of one, two, or three genes are generating these traits…

A: Diploid organisms has two sets of chromosomes. Thus, they carry two copies of almost all genes.…

Q: For all seven characters described in the data of Mendel allowed the F2 plants to self-fertilize. He…

A: Step 1 The basic principles of inheritance as given by Mendel are collectively called Mendel’s…

Q: What color are all the kernels in the F1 generation?   a. All black b. All yellow c. A mixture of…

A: F1-generation (filial-1 generation): it is the result of a parental generation cross, which means it…

Q: Fruit flies with the genotypes XghXgh and Xg+h+Y are crossed. Note that two X-linked loci are being…

A: Alleles are the variants of genes. Dominant allele is the one that is expressed even if present in a…

Q: In a species of tropical fish, a colorful orange andblack variety called montezuma occurs. When…

A: Inheritance is the process of transmitting the traits from parent to offspring. Traits of an…

Q: Fruit flies are very useful model organisms that have been used to study genetics. One mutant…

A: An eyeless fruit fly is represented by ey gene which is a recessive gene. Homozygous normal fly is…

Q: Assume for a moment that you are working in a genetics lab with the fruit fly Drosophila…

A: Introduction  Sir Gregor Mendel is known as Father of Genetics. He was the pioneer scientist who…

Q: Figure 5.1 presented abbreviated pedigrees looking at the inheritance of X-linked human conditions.…

A: Double heterozygote = Individual 1 in generation II, if the mother in generation I is homozygous…

Q: Researchers studying blind cave fish that lack eyes found that crossing two pure-bred fish from the…

A: Within the puzzling depths of caves, analysts have found fish that have adapted to their environment…

Q: The following cross is conducted between varieties of corn plants that exhibit the following…

A: Mendelian Genetics and Independent AssortmentMendel's laws of segregation and independent assortment…

Q: If a mouse has a dominant phenotype (P_), how would you determine if it is homozygous (PP) or…

A: Each gene coding for a specific trait has two alternative forms called alleles. These alleles can be…

Q: Retinitis pigmentosa, a form of blindness in man, maybe caused either by a dominant autosomal gene…

A: Given that, there are two genes which control retinitis pigmentosa. It can be caused by dominant R…

Q: Imagine you are performing a cross involving seed color in garden pea plants. What F, offspring…

A: The seed color in pea plants can be yellow or green and these phenotypes are encoded by allele Y and…

Q: What is/are the phenotypes of the recombinant offspring of the F2generation?a. red eyes, long…

A: DNA recombination entails the sharing of genetic material between many or different chromosome…

Q: The mutant FMR-1 allele that causes fragile X syndrome is considered to be X-linked dominant…

A: Fragile X syndrome is a genetic disorder. It causes various developmental disorders that include…

Q: Manx cats have no tail. This is caused by a dominant mutation M, which is embryo lethal when…

A: A lethal gene is a gene which when present in its specific condition (dominant or recessive) causes…

Q: The following pedigree shows the inheritance of deafmutism.a. Provide an explanation for the…

A: Deafmutism is a term that is used to define a person who is deaf. These individuals use sign…

Q: Three genes in fruit flies affect a particular trait, andone dominant allele of each gene is…

A: Let us represent the three different genes responsible for the wildtype trait as A, B, and C. The…

Q: Two parents, both with blood type A, have three children in a row with blood type O. a. Is this…

A: There are four different blood types in the ABO Blood Group System: A, B, AB, and O. Each of these…

Q: In this case a family history revealed a genetic basis for the disorder. The pedigree is shown in…

A: Traits are classified into two types: autosomal and sex-linked traits. Autosomal traits are…

Q: 1. The garden flower Salpiglosis sinuate ("painted tongue") come in different colors. Several…

A: Given data is as follows: Parents F1 phenotype F2 phenotype Red x blue All red 102…

Q: n mice, the Ay allele of the agouti gene is recessive lethal, but it is dominant to wild type for…

A: Introduction  In genetics, dominance and recessiveness refer to the relationship between two or more…

Q: A mutant allele in persons with familial hypercholesterolemia (FH) causes death due to a lack of…

A: A mutant allele is a variant form of a gene that has arisen due to a change or mutation in the DNA…

Q: When two inbred plants with triangular pods were crossed, the Fi plants all had ovate The resulting…

A: This is definitely a cross in which an allele apart from the main allele also determines the pod…

Q: In polygenic systems, how many phenotypic classes corresponding to number of polygene “doses” are…

A: In any population a number of phenotypes may be found. Phenotype is the expressed traits observed in…

Q: Assuming a pure-breeding P generation, what ratio would you expect in the F2 generation if a mutant…

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

Q: You have spent two decades studying a muscular dystrophy disorder. All previous pedigree data…

A: X linked disease is a type of sex linked disease in which the mutation is present in X chromosome.…

Q: . Mice normally have one yellow band on each hair, butvariants with two or three bands are known. A…

A: Inheritance is the phenomenon of the passing of genes from one generation to another. The genes code…

Q: 26. Filled-in symbols in the pedigree that follows designate individuals who are deaf. a. Study the…

A: Pedigree is defined as a chart which is the representation of the phenotype of specific genes of the…

Q: You cross a black dog which is homozygous dominant for two genes B and E (B determines pigment…

A: The Principle of Independent Assortment describes how different genes independently separate from…

Q: d. white; if the genotype of the parent in question is Aa, it is likely 9. A yellow Labrador…

A: The coat colour in Labrador are black, brown and yellow. It is governed by 2 genes, B and e gene.…

Q: On a fox ranch in Wisconsin, a mutation arose that gavea “platinum” coat color. The platinum color…

A: A gene is the essential physical and functional unit of heredity. They are comprised of DNA…

Q: me astigmatism and non-red hair are produced by a different pair of completely dominan genes. Hence,…

A: Let, A = allele for astigmatism, a = doesn't show astigmatism, B = allele for non-red hair, b =…

Q: he genotype and phenotype for F1 and F2 generations. B- Using a Punnett Square show the cross…

A: Punnett squares help us to solve the genetic crosses related to classical genetics. It represents…

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.