In Labrador retrievers fur color is controlled by two genes. One gene controls pigment production with the dominant B allele producing a black pigmentation and the recessive b allele a brown pigmentation. The other gene controls the deposition of the pigment in the hair with the dominant E allele producing a functional transport system and the recessive e allele a nonfunctional transport system. Which of the following genotypes belongs to a true-breeding yellow lab, i.e. a lab that always produces yellow offspring when bred with another lab of the same genotype?

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

A: Introduction :- D. melanogaster is an ideal model organism due to a variety of characteristics. The…

Q: The difference in phenotype between pups 2 and 3 (black progeny) can be explained as moderately…

A: Phenotype  The appearance of an organism is known as phenotype. The phenotype of an organism is the…

Q: A male mouse with genotype Igf2 Igf2m is crossed with a female who is Igf2 Igf2.  What would be the…

A: 3/4 of the offspring would be normal; 1/4 would be dwarf

Q: mice, the A allele causes agouti fur, the AY allele causes yellow fur and is dominant to the A…

A: The gene in question is thought to be important, and the deadly allele can be dominant or recessive.…

Q: You are mapping three linked loci in Drosophila melanogaster (the common laboratory fruit fly). You…

A: The fruit fly Drosophila is commonly associated with genetics due to the dominance of post-Mendelian…

Q: Three autosomal recessive mutations in yeast, all producing the same phenotype (m1, m2, and m3), are…

A: An autosomal recessive mutation means two copies of an abnormal and defective gene must be present…

Q: Marfan syndrome is a disease caused by a rare dominant allele of the fibrillin-1 gene. Fibrillin-1…

A: Marfan syndrome refers to the genetic disorder related to connective tissue characterized by tall…

Q: The aldose gene is 10 map units from the fructose gene. (A = dominant allele, can produce aldose; a…

A: Alleles are the alternative forms of a gene that are located on the same locus of a homozygous…

Q: Fruit flies express both normal wing shape and vestigial wing shape. The pedigree shows the…

A: Introduction :- Vestigial organs are organs that have no obvious function and are thought to be…

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: Pigment of chicken feathers is regulated by two genes, the gene for feather pigment C, and a gene…

A: As given in the question,Inhibition is dominant to uninhibited, pigmented feathers are dominant to…

Q: h se g. +se+ + se g. ++g. h se + + + + h+g. h++ TOTAL Oh; 16.4 O se; 7.1 is the gene in the middle…

A: Genetic linkage is the tendency for genes located close to each other on the same chromosome to be…

Q: In the following schematic drawing of a Holliday junction,one chromatid is shown in red, and the…

A: a) Cuts should occur at positions 2 and 4 to get recombinants. A Holliday model can be resolved in…

Q: magine that you finally solved the mystery of the color pattern of zebras. One gene defines the…

A: Codominance is a form of inheritance wherein the alleles of a gene pair in a heterozygote are fully…

Q: A complex biochemical pathway is shown below, along with the alleles that either promote or inhibit…

A: Metabolic pathways or biochemical pathways are a series of chemical reactions that occur within the…

Q: The wingless fruit fly phenotype (unable to grow wings) is recessive to normal wing growth. A…

A: The wingless male fruit fly is crossed with a wingless female fruit fly and the progeny produced by…

Q: The genome of Drosophila has been studied extensively using the technique of gene mapping. In…

A: A measure of the probability that two genetic loci (positions on a chromosome) will be inherited…

Q: A panel of cell lines was created by human–mouse somatic-cell hybridization. Each cell line was…

A: Somatic cell hybrids are culture lines that contain the entire complement of the mouse genome and a…

Q: While studying the genetics of the "Cute Faced Bat" face structure gene, three alleles (CO, CN, CF)…

A: An allele is a gene's alternative version that exists on the same locus. Each gene only has two…

Q: The dosage of X chromosome expression is equalized between male and female mammals.  Think about the…

A: Calico cats produce a fur coat exhibiting both orange and black colors. The coat color gene is…

Q: evidence suggests that spherocytosis is incompletely penetrant?

A: Spherocytosis is a condition that affects red blood cells. People suffering from spherocytosis…

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: locus. The allele for brown eye color is dominant to the allele for brick red eye color and to the…

A:

Q: In mice, the A allele causes agouti fur, the AY allele causes yellow fur and is dominant to the A…

A: Introduction  Certain genes are absolutely essential for the survival of an organism and the allele…

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

A: Given: Miniature wings Xm - recessive Long wings X+ - dominant Male parent - long wings Female…

Q: In the mouse, gene B can produce black pigment from a colorless precursor molecule. A mouse having…

A:

Q: In the yawncat (a rare hypothetical animal), the dominant allele R causes solid tail color, and the…

A: ANSWER;- A). 1/16

Q: Several loci affect hair development in dogs. The allele for wire hair (W) is dominant to its allele…

A: Wire hair is dominant. Wire hair-W Straight hair-W Hairlessness is dominant in mexican dogs.…

Q: In Drosophila, three autosomal genes have the following map:20 m.u. 10 m.u.a b ca. Provide the data,…

A: Gene mapping is the way in which a genetic map is designed that will use recombination frequency…

Q: Consider the first category of test-cross offspring shown in figure 8.2 (+b, LS). Consider also that…

A: In the test-cross in question, heterozygous female flies with the genotype +b, LS were used. In…

Q: In the species Polyfarius obscescens, one gene controls lipid storage. Individuals with the dominant…

A: Storage lipids, also known as triacylglycerols, membrane lipids, which include glycerophospholipids…

Q: In mice there are two loci responsible for coat color:      Locus 1B- determines whether hair has…

A: It is given that locus 1B determines whether hair has bands or not and the coat color. Homozygous…

Q: The miniature gene in Drosophila is located on the X-chromosome, It has two alleles; the mutant…

A: The correct answer is option (a) i.e. Xm-/Y.

Q: Which of these predictions would you make for a gene that is haplosufficient and essential for…

A: In haploinsufficiency (most genes), a solitary typical allele gives sufficient capability, so A+A−…

Q: One particularly useful feature of the Hardy-Weinberg equation is that it allows us to estimate the…

A: Hardy-Weinberg equilibrium states that, in a population allele and genotypic frequencies will remain…

Q: a) List all of the phenotypes we could observe among offspring of these Ss heterozygote parents. b)…

A: a)The possible phenotypes among offspring of Ss heterozygote parents are:- SS homozygote (spine…

Q: Wild-type mice have brown fur and short tails. Loss of function of a particular gene produces white…

A: The recombination frequency is calculated as the number of recombinant progeny divided by the total…

Q: In purple potatoes, let's say that 2 unlinked genes are needed to produce purple color. The 1st…

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

Q: Consider the following statement: ‘female, w+w flies have red eyes’. In this example: Group of…

A: The objective of the question is to identify the correct relationship between genotype and phenotype…

Q: Gene I interacts with gene D to determine the blood phenotypes of humans. Gene I is the gene for…

A: Introduction  An individual's blood is categorised according to their blood type based on the…

Q: Four homozygous recessive mutant lines of Drosophilamelanogaster (labeled 1 through 4) showed…

A: Introduction Heterozygous means that you have inherited various versions of a gene from each parent.…

Q: Suppose a geneticist is using a three-point test cross to map three linked rabbit morphology and…

A: Linkage is a genetic phenomenon in which tendency of DNA sequence that are close together in a…

Q: Assume that a single gene determines coat coloration in cats, with the B allele resulting in orange…

A: A. What is the probability that Hobbes and Pepper have three kittens, Hopper (male), Pepsi (female),…

Q: In the fungus Neurospora, a strain that is auxotrophic for thiamine (mutant allele t) was crossed…

A: Neurospora is an Ascomycete fungus genus. The genus name, which means "nerve spore," refers to 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.