Suppose a geneticist uses a three-point testcross to map three recessive, linked hummingbird wing-shape mutations called tk, f, and s, where tk is associated with thick wings, f is associated with flat wings, and s is associated with sharp wings. He first crosses homozygous sharp birds to homozygous thick, flat birds. Next, he testcrosses the Fi progeny to thick, flat, sharp birds. He obtained the results shown. Given this data, label the progeny phenotypic classes as either parental, single crossover (SCO), or double crossover (DCO) recombinant types. Each label may be used multiple times. Two classes have already been filled in. Phenotype Number Recombinant type sharp 819 Answer Bank thick, flat 821 SCO DCO flat 183 parental thick, sharp 169 SCO thick 6. flat, sharp thick, flat, sharp 28 SCO wild type 26

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: You obtain two plants, one that is homozygous wild-type at locus B and one that is homozygous for a…

A: A natural form of gene is a wild-type gene. A wild-type gene is in its original form and is not…

Q: You are evaluating a trait that is associated with fur color in mice. The trait is controlled by a…

A: Here  the genotype of the mother is A1A1 and the genotype of the father is A2A2  By Crossing we get…

Q: On a summer trip to the Galapagos you collect two finch species, Geospiza fortis and G. pauper and…

A: Geospiza pauper is also known as medium tree finch, categorized under critically endangered.

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: In mice, gene A is epistatic to gene B. Dominant allele "A" allows for pigment to be transported to…

A: Epistasis is the type of gene interaction in which a gene masks or interferes in the expression of…

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: 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: In a newly discovered species of Giant Pacific Octopus, long tentacles (L) are dominant to short…

A: Each chromosome is made up of two sister chromatids, each of which contains the same genetic…

Q: Question: A second trihybrid test cross was performed involving female octopus that were…

A: Answer :-

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: Discuss why Mendel's hybrid offspring begin to exhibit the original traits expressed by the P1…

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

Q: Assume that coat texture and coat color in domestic dogs are two different traits that are…

A: Genes are the heritable unit that carries the genetic information from the parent generation to the…

Q: In a newly discovered species of Giant Pacific Octopus, long tentacles (L) are dominant to short…

A: As per the question , there are three traits in Giant Pacific Octopus . I ) Length of tentacles :-…

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: When you are visiting the local pet store you start talking to them about their Ceti alpha-5 eel…

A: Gregor Mendel gave three principles of inheritance. The dominance is a concept where one allele of…

Q: Line 1 Line 2 Line 3 Line 4 Line 5 Line 6 Line 7 Line 8 Line 9 Line 10 Line 1 Line 2 + Line 3 + ??…

A: Groups of mutations that do not complement each other constitute a complementation group, which is…

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

A: Pure breeding means the homozygous for the allele. Lets consider that breeder were crossing 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: 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 recessive maternal effect mutant in zebrafish, called ichabod, results in embryos lacking heads…

A: The correct answer is option C.

Q: Suppose a species of tulip has three alleles for the gene that codes for flower color. The CR allele…

A: CRCB × CBCW:Possible combinations: CRCB × CB, CRCB × CWExpected phenotypic ratio: 1 : 1 : 0 : 0 (red…

Q: Pink eye and albinism are two recessive traits found in the deer mouse, Peromyscus maniculatus. In…

A: In this case, albinism and pink eye color are recessive traits found within the deer mouse…

Q: Drosophila eye color is determined by a single gene. Supposed you collect a population of drosophila…

A: Inheritance patterns are of different type’s   Mendelian inheritance, incomplete dominance,…

Q: In tomatoes, tall plant (D) is dominant over dwarf plant (d) and smooth fruit (H) is dominant over…

A: The two genes are involved in dihybrid cross.

Q: In a newly discovered species of Giant Pacific Octopus, long tentacles (L) are dominant to short…

A: Newly discovered species of Giant Pacific Octopus having long tentacles, strong suction cups and…

Q: This pedigree traces the inheritance of a rare disease in humans. a. Based on this pedigree, is the…

A: Answer is given below.

Q: Suppose that goats have one gene that codes for color, where A is brown and a is white. The goats…

A: Answer :- To calculate the probability of producing three out of five offspring that are brown (Aa)…

Q: 6. Here is a cat family. Back fur is created by BB or Bb. White by bb. a) Based on what the pedigree…

A: Given: Black fur - BB / Bb White fur - bb

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…

Genetic Variation

Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.

Quantitative Genetics

Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.