Part A) You cross a fly with straight wings with a fly with curved wings to produce the F1 generation, all of which exhibit straight wings. In the F2 generation, you observe 65 straight-winged flies and 16 curved-wing flies. Based upon the results, which phenotype is recessive? Part B) You think this trait is controlled by a single gene, but the F2 numbers don’t quite match a 3:1 expected ratio. Perform a chi-square analysis to determine if the variation you observe is due to chance or not. Based upon this determination, would you keep or reject the “null hypothesis”? Show your work and explain your reasoning.

Q: Suppose a geneticist uses a three-point testcross to map three recessive, linked hummingbird…

A: Three-point test cross: A three-point test cross is a genetic experiment used to determine the…

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: n a certain plant, the dominant form of gene P codes for purple flowers while the recessive form…

A: Gregor Mendel discovered the fundamental doctrines of inheritance through his study of pea plants.…

Q: You now take an F1 female and cross her to a true-breeding black, wingless male. What is his…

A: Given DataB for Brownb for BlackW for normal wingsw for wingless.I am takingB = Ab = a W =Ww =…

Q: Deafness is often inherited in humans as an autosomal recessive trait. Assume that this is the case…

A: BASIC INFORMATION  AUTOSOMAL RECESSIVE DISORDER - it means that the trait will be present on the…

Q: Based on the same data from the previous question:   cu  jv  se        31 +   +   se       99…

A: In Drosophila, curled wings (cu), javelin bristles (jv) and sepia eyes (se) are autosomal recessive…

Q: strains of Drosophila that have either normal legs or abnormally short legs and you are studying the…

A: Law of dominance says that dominant character is expressed in two conditions either  in homozygous…

Q: were observed and used to make a map of these genes.  Calculate the interference.…

A: Answer. The linkage of the genes in a chromosome can be in the form of a genetic map or linkage map.…

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

A: Suppose, se is the recessive mutated allele and it's wild type dominant form is se+ allele…

Q: b. What if a breeder were working with 7 different, independently segregating genes, as Mendel did?…

A: Probability is a measurement used in genetics to forecast the likelihood that the desired trait will…

Q: In humans, the genetic disease cystic fibrosis is caused by a recessive allele (a). The normal…

A: Cystic fibrosis is only caused when both of the mutant alleles for cystic fibrosis are present. AA…

Q: cular country in sub-Saharan Africa, a medical study revealed that 0.075% of the country's…

A: Given; The study done in sub Saharan country.0.075% of the country's population are suffering from…

Q: you have found a recessive mutant fruit fly with no antennae. You interbreed this fly with its…

A: The correct answer is- a) only one gene controls antennae development, and the parents of your cross…

Q: Bees have a haplodiploid sex determination.  The recessive allele ivory causes bees to have white…

A: In honeybee, the sex is determined by being haploid or diploid. Here, females are diploid while…

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

A: In our analysis of genetic mutations, it is imperative to calculate recombination frequencies to…

Q: Albinism is a recessive trait in humans.A geneticist studies a series of families in which both…

A: Exceptions to the Mendelian pattern of inheritance are many in number, which are important to study…

Q: Red body in flies are dominant to yellow body, and long wings are dominant to short wings. A test…

A: This means the parent fly with red, short-wings is heterozygous for the body color and also the…

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: Mendel obtained his initial pea plant varieties from local breeders who were developing new…

A: Introduction: Mendel used Punnet squares during his experiments on pea plants. He used genetic…

Q: In the Manx tailless phenotype of cats, the tailless phenotype is caused by the mutation ML and is…

A: If the Manx tailless phenotype is caused by the mutation ML and inherited as an autosomal dominant…

Q: Write the genotype(s) of the flies in each generation. Use a low dash (e.g. A_ B_) to indicate…

A: Given  Both have fruitflies are taken from different strains.  Strain A = bright red eye  Strain B =…

Q: In Drosophila, the recessive mutations hairy (h) causes a hairy body and curled (cu) causes curled…

A: h causes a Hairy body and cu causes curled wings.Recombination causes the exchange of genetic…

Q: 2) When chickens with splashed white feathers are mated with black feathered birds, all the…

A: The term genotype relates to an organism's genetic makeup, whereas phenotype refers to visible…

Q: What was the hypothesis of the X-linked cross conducted in the lab (between white-eyed female and…

A: White eye color in drosophila is an x linked recessive mutation that causes phenotype change. These…

Q: Parent Cross: Blue-Eyed Male x Normal Female Blue-Eyed Female F1 Offspring Normal Male Normal Female…

A: Drosophila melanogaster. The position of the white eye gene, positioned at the x-chromosome of this…

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

A: Introduction :- Hypercholesterolemia is a medical condition characterized by high levels of…

Q: A researcher crosses mice with apricot eyes and long tails, and the F1 progeny were recovered in the…

A: Null hypothesis - The expected ratio is 9:3:3:1 for F2 generation.

Q: Two different genes control the expression of kernel colour in Mexican black corn: black pigment…

A: Introduction :  Genetic traits are passed down through inheritance from parents to their offspring,…

Q: Two brown bears have cubs in late spring. The mother bear has the phenotype for long front claws.…

A: Genotype is mentioned to the genetic makeup of an individual and phenotype refers to the physical…

Q: You are studying cushion plants in New Zealand: the wild-type cushion plan has a wide canopy. You…

A: When the nucleotides sequences in the genome of an organism are altered or changed due to mistakes…

Q: Imagine that you set up a three-point mapping cross to determine the order of three X-linked genes.…

A: This is the case of three point test cross. The crossing over occurs between the heterozygous…

Q: You are doing a genetics experiment with Drosophlia melanogaster, the fruit fly. In the "P"…

A: Given- 1. The female Drosophila is brown and wingless. 2. The male Drosophila is black and normal…

Q: You are attempting to map the chromosome of a silk moth. You know that red eyes and white banded…

A: Linkage is a phenomenon which determines how genes are present in close proximity to the body, but…

Q: Bats with the B allele OR the S allele suck blood. But bats who are bbss don't suck blood. You cross…

A: The alleles are generally of dominant and recessive type and some other forms like codominant are…

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: What is the genetic distance between red petals and waxy texture?

A: Gene distance  Gene distance means the number of bases present between two gene. On the basis of…

Q: In your experiments with Drosophila, you found that the wildtype allele that codes for grey adult…

A: A person exhibiting a dominant phenotype may have a total of two copies of the dominant allele or a…

Q: Dr. Disney has been raising exotic fruit flies for decades. Recently, he discovered a strain of…

A: The given question refers to that the resulting progeny of 500 fruit flies consists of:41 having…

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: Suppose a mutant fruit fly with blue eyes was recently discovered. It is later determined that the…

A: The most common and popular way to represent mutant and wild-type alleles in Genetics, is by using…

Q: What gene is in the middle?

A: The genotypes found most frequently are the parental genotypes. Hence parents are: + + cn and b wx +…

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: Given these parents-note, they are NOT quite the same as each other!: mom = Aa Bb Cc Dd dad = Aa Bb…

A: The product rule is used in this case. The multiply of each gene is done in this case.  The A gene…

Q: One of the autosomal loci controlling eye color in fruit flies has two alleles: one for brown eyes…

A: The fruit fly's color of the eye is further controlled by the autosomal locus. The given fly…

Q: A sex-linked recessive allele rg causes a red-green colorblindness in humans. A normal woman whose…

A: Mostly the sex-linked diseases are X-linked ( unless stated otherwise). These alleles are found only…

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…

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.