Consider three autosomal genes (A, B and D) present in a hypothetical species. The a allele results in male development, the A allele results in female development while a heterozygote produced hermaphroditic development, rendering the individual sterile. The genes at the B and D loci show complete dominance, with the dominant alleles producing long tails (B) and black whiskers (D), while the recessive alleles produce short tails and grey whiskers, respectively. You cross a male with a long tail and black whiskers with a female that has a short tail and black whiskers. All the F1 individuals recovered have long tails, with some having black whiskers and others having grey whiskers. a) All the F1 offspring are sterile. Why is this the case?

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: In Drosophila, the genes for body coloration and eye size are on different chromosomes.…

A: A gene is the basic structural and functional unit of life and is composed of DNA(deoxyribonucleic…

Q: When two long-winged flies were mated, the offspring included 77 with long wings and 24 with short…

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

Q: Illustrate the Parental and F1 cross

A: Trihybrid cross is between the two individuals of a species for studying inheritance of three pairs…

Q: at two genes are linked? Describe with an example what would you expect from two linked genes…

A: Genetics is defined as the field of biology that mainly deals with the study of genes, their…

Q: Phenotypically wild-type F1 female Drosophila, whose mothers had light eyes (lt) and fathers had…

A: The distance between two points on a chromosome can be calculated by counting the number of…

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: Suppose that in a mammalian species, the allele for black hair (B) is dominant to the allele for…

A: According to Mendelian inheritance, a single character is controlled by one or more genes and each…

Q: In German cockroaches, bulging eyes (bu) are recessive to normal eyes (bu+), and curved wings (cv)…

A: Answer is e.bu cv+

Q: Eye color in Drosophila is determined by a gene is on the X chromosome, with the red-eye allele…

A: Each gene possesses two forms of alleles. These forms include a dominant allele and a recessive…

Q: As shown in the Punnett square below, one variety of deafness is caused by an autosomal recessive…

A: An autosomal recessive disorder is defined as a condition or state in which two copies of an…

Q: In silkmoths (Bombyx mori), red eyes (re) and white-banded wings (wb) are encoded by two mutant…

A: Sometimes genes depicting two characters are present on the same chromosome. Such genes are called…

Q: Imagine the white flowers are recessive to purple flowers, and yellow seeds are recessive to green…

A: A mating between two animals that are perfectly hybrid for two features is referred to as a dihybrid…

Q: Assume you are studying development in two species of iguana. You determine that a certain gene,…

A: The answer is d heterochrony

Q: The Soay sheep of St. Kilda Island near Scotland have changed coat color over the past 20 years,…

A: Phenotype is an “observable characteristic”. A genotype is the actual “pair of alleles” present in…

Q: Curly wings is a recessive character in the fruitfly Drosophila melanogaster.  The wild type…

A: The dominant trait is straight wings. It is dominant over curly wings. Let S and s are two alleles.…

Q: For the fish model organism Medaka (Aplocheilus latipes), genes at 2 loci (B, b and R, r) determine…

A: Introduction :- Phenotypic ratio is described as the probability of finding the patterns and…

Q: Consider a Droscophilia fly with a genotype of Nn XqYY

A: Drosophila is a model organism commonly known as the fruit fly.

Q: Which of the following findings supports the fact that the presence of the Y-chromosome rather than…

A: In mammals the sex chromosomes are X and Y. The genotype for a normal female is XX and that of…

Q: crossing between two heterozygous fruit flies, the ratio was shown to be 9:3:3:1. What would the…

A: This is a dihybrid cross involving two traits. It was experimented on by Gregor Mendel. It first…

Q: If a male bird that is heterozygous for a recessive Z-linked mutation is crossed to a wild type…

A: In case of birds the males are homozygous for the sex chromosome and the genotype is ZZ. The females…

Q: homozygous recessive (aa,tetrapter) f1 produces homozygous (aa) f2, what is the dominant and…

A: Recessive character is expressed only in homozygous form. On the other hand,  dominant character is…

Q: Honey Bees are unusual in that male bees (drones) have only one copy of each gene, while female bees…

A: The genotype is defined as a part of the genomic constitution of an organism that controls different…

Q: Consider the pedigree Figure1.  Unless there is evidence to the contrary, assume that individuals…

A: Albinism is known to be an autosomal recessive trait. As it is an autosomal recessive condition, the…

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: 近 In 1911, Thomas Hunt Morgan collected the following crossover gene frequencies while studying…

A: The genes are the hereditary unit of an organism. The genes are present in the chromosome that is…

Q: In German cockroaches, bulging eyes (bu) are recessive to normal eyes (bu+) and curved wings (cv)…

A: Introduction Dihybrid cross deals with two traits controlled by two pair alleles such as Bulging…

Q: Ectrodactyly, also known as “lobster claw syndrome,” is a recessivedisorder in humans. If a…

A: A recessive trait is always expressed in Homozygous condition that is when individual possess two…

Q: Suppose that in a species of mouse, the gene for brown coat color is dominant over the color black.…

A: The relationship between genes in epistasis is hostile, with one gene masking or interfering with…

Q: Anhidrotic ectodermal dysplasia is an X-linked recessive disorder in humans characterized by small…

A: Anhidrotic ectodermal dysplasia (AED) is a type of immune deficiency observed in the human body. The…

Q: In C. elegans, lon-2 and unc-2 are recessive mutations that are 8 map units apart on the X…

A: A map unit is defined as the distance between two linked gene pairs where 1% of the products of…

Q: Assuming two independently assorting gene loci for eye color and wing length in Drosophila…

A: A dihybrid cross is a type of cross in which two traits are involved .  As per the question , two…

Q: sexually reproducing animal has two unlinked genes, one for head shape (H) and one for tail length…

A: Gametes contain one allele of the whole gene.  So possible genotypes of gametes is HT only

Q: Consider the following three autosomal recessive mutations in Drosophila: vestigial wings (v); wild…

A: Three point test cross is given in the question. The F2 progenies is used to find the middle gene.

Q: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…

A: Inheritance or heredity is passing-on one trait from the parents to the progeny by either asexual or…

Q: Mate two flies. a male is a wild type and a female has yellow body and purple eyes.

A: As you asked many questions here I'm giving answer's of 3 questions  Rest please repost…

Q: Mating took place between males and females of a fruit fly, and individuals appeared With the…

A: Introduction: In Drosophila, sex determination is determined by a balance of female determinants on…

Q: Consider the following variations in Drosophila melanogaster, relative to the wild-type: White eyes…

A: a) White eyes is a recessive trait and it's gene is found on chromosome number 1 So, the genotype of…

Q: Let's consider a paternally imprinted gene. A female skink inherited alleles that that confer: 1) a…

A: Imprinted genes are genes whose expression is determined by the parent that contributed them.…

Q: The testcross of a trihybrid Drosophila female with a homozygous recessive male (three-point…

A: 8 different phenotypes

Q: Consider the results of a three point linkage mapping testcross between a female (AaBbCc) and a male…

A: We know that test cross is performed always between the F1 progenies and recessive parents. So…

Q: Suppose two independently assorting genes are involved in the pathway that determines fruit color in…

A: Genes are the hereditary units of life. Genes contains two alternative forms called alleles. The…

Q: If a drone with short wings and black eyes was mated to a queen that is heterozygous for both genes,…

A: A genotype is a living being's complete arrangement of hereditary material. Regularly, however, a…

Q: Muscular dystrophy   A.Shows simultaneous presence of hypertrophic and atrophic muscle fibers in the…

A: Muscles are soft tissues in the human body that contains protein filaments called actin and myosin,…

Q: In rabbits, the gene for fur color is multiallelic. Agouti (C) is dominant to chinchilla (Cch),…

A: Term Phenotype refers to the observable characteristics or physical properties which can be observed…

Q: In the fruit fly Drosophila melanogaster, the following genes and mutations are known:Wing size:…

A: Gene: Genes are genetic material that passes from parents to progeny. The dominant allele can…

Q: Suppose two independently assorting genes are involved in the pathway that determines fruit color in…

A: In genetics, the genes are the hereditary units of life. Each gene has its alternative forms called…

Q: Female Drosophila heterozygous for three recessive mutations e (ebony body), st (scarlet eyes), and…

A: Female Drosophila heterozygous for three recessive mutations e (ebony body), st (scarlet eyes), and…

Q: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…

A: To calculate The map distance separating two genes