How do we know that Drosophila utilizes a different sexdetermination mechanism than mammals, even though it has the same sex-chromosome compositions in males and females?
Q: How many gametes of differing genotypes can a female drosophila of genotype ABC/abc produce? How…
A: There will be same gametes will be developed in males and females. The explanation is given bellow.
Q: Describe the formation steps of the dorso-ventral axis during development in Drosophila.
A: The mother fly produces oocytes that have already got anterior-posterior and dorsal-ventral axes…
Q: What are the designations of the sex chromosomes in males of bugs, humans, and butterflies?
A: Chromosomal determination of sex It is also known as allosomic determinati9on of sex and is based on…
Q: n Drosophila, one of the genes controlling wing length is located on the X chromosome. A recessive…
A: 1. Male with miniature wing, red eye. Female with Normal wing, red eye. 2. Phenotypes on…
Q: What would be the most likely effect on development of puncturing the posterior end of a Drosophila…
A: Egg polarity are the earliest activated genes, which decide the formation of main body axis, such as…
Q: In considering the formation of the A–P and D–V axes in Drosophila, we noted that, for mutations…
A: Maternal effect genes are the ones that are contributed to the egg by females.
Q: what is the Mechanism of DNA Replication in DrosophilaChromosomes?
A: DNA replication is the process in which DNA makes a copy of itself by copying a double-stranded DNA…
Q: Why does X inactivation occur in female mammals?
A: A Chromosome is an entire chain of Deoxyribonucleic acid (DNA) with stabilizing proteins. The DNA is…
Q: In Drosophila, a heterozygous female for the X-linkedrecessive traits a, b, and c was crossed to a…
A: X-linked recessive inheritance is a genetic condition that can be passed from parent to child…
Q: Explain the process of X-Chromosome Inactivation in Mammalian Females.
A: Mammals are the vertebrate having mammary glands as one of their main characteristics which…
Q: The Amami spiny rat (Tokudaia osimensis) lacks a Y chromosome, yet scientists at Hokkaido University…
A: Reproduction: Important biological process by which new offspring are reproduced by their parents is…
Q: What changes, if any, would you predict would occur in the pigmentation of Drosophila melanogaster…
A: The relatively simple morphological trait that helps in the mapping of the genetic basis of…
Q: . Researchers discovered recently that the sole functionof the SRY protein is to activate an…
A: There are various genetic disorders that develop due to anomalies in sex chromosomes. They normally…
Q: What is positional information? Discuss three different ways that cells obtain positional…
A: Drosophila is a commonly used model organism for studying developmental biology and genetics. The…
Q: What pathway is Fog2 gene product a part of and how does it affect sex determination?
A: Gata4 together with the cofactors Nr5a1 (Sf-1) and Fog 2 (Friend of Gata, 2; also known as Zfpm 2 )…
Q: Drosophila melanogaster has which four linkage groups?
A: The tendency of the genes to locate on the same chromosome, to stay together in the hereditary…
Q: How do we know that human aneuploidy for each of the 22 autosomes occurs at conception, even though…
A: Developmental biology is the branch of biology in which the development of the organisms from the…
Q: In certain salamanders, the sex of a genetic female can be altered, changing her into a functional…
A: Salamanders are vertebrates and they belong to class amphibia. Salamanders can survive on both lands…
Q: In Drosophila, two mutations, Stubble (Sb) and curled (cu), are linked on chromosome III. Stubble is…
A: Dominant genes are those genes whose trait or phenotype will be expressed. Recessive gene is the…
Q: What is the most likely method by which a gene produces red eyes in fruit flies?
A: Answer is C. Mutation changes the coding sequence of the genes so that it codes for red protein…
Q: What will be the effect on sexual development in newly fertilized Drosophila embryos if the…
A: Sex determination in drosophila melanogaster is done by balancing the male determinants on the…
Q: Why is it that so many of the sex-linked traits we talk about in humans are carried on X chromosomes…
A: Traits can be dominant, recessive, sex linked recessive or sex linked dominant. Dominance is the…
Q: The inheritance in short wings in Drosophila fruit flies is an x-linked trait, recessive. Which…
A: X-linked recessive inheritance is caused when a mutation occurs in the X-chromosome therefore a male…
Q: Crossing-over does not occur between any pair of homologous chromosomes during meiosis in male…
A: During meiosis, crossing over allows recombination of genes between homologous chromosomes. Based on…
Q: Why is drosophila aconvenient animal for thestudy of linked genes?
A: Genetics is the branch of biology, which deals with the study of genes, their pattern of…
Q: explain Position-effect variegation in Drosophila?
A: Mutation is defined as the permanent change or alterations happening in the sequence of the DNA of…
Q: What will be the effect on sexual development in newly fertilized Drosophila embryos if the…
A: In Drosophila, sex determination is achieved by a balance of female determinants on the X chromosome…
Q: What possible conclusions can be drawn from the observations that in male Drosophila, no crossing…
A: The structural components are also termed synaptonemal complexes. During the zygonema stage of…
Q: What will be the effect on sexual development in newly fertilized Drosophila embryos if the…
A: Sex determination in Drosophila is achieved by the balance of female determinants on the X…
Q: A female Drosophila with the mutant phenotype 'notched wings' was mated to a wild type male.…
A: Drosophila melanogaster is a fly species that belong to order Diptera. This is also known as fruit…
Q: How do homeobox genes control segmental identity in drosophila embryo?
A: Homeobox genes encode DNA binding proteins that regulate the gene expression and controls…
Q: What will be the effect on sexual development in newly fertilized Drosophila embryos if the…
A: In Drosophila, sex determination is achieved by a balance of female determinants on the X chromosome…
Q: Where are there over 250 species of fruit flies (Drosophila)?
A: Drosophilidae, which members are often referred to as "small fruit flies”. Drosophila melanogaster…
Q: In Drosophila, three loci, Bar eyes (B, dominant), Scalloped wings (sd, recessive), and tan body (t,…
A: If the genes are located on the same chromosome then they do not allow crossing over between them.…
Q: In humans, males are heterogametic and females are homogametic, Explain. Are there any examples…
A: Answer In humans the 23rd pair of chromosomes contains.
Q: Why is it that mutations in bicoid and nanos exhibit genetic maternal effect in Drosophila (a…
A: the bicoid gene is a maternal effect gene in Drosophila which is responsible for the development of…
Q: What is dosage compensation with respect to the sex chromosomes? Briefly explain how this is…
A: The method by which organisms adjust gene expression between individuals of different biological…
Q: How do the chromosomal mechanisms determining sex differ in the three taxa males of bugs, humans,…
A: Mammals belong to the class Mammalia. They are vertebrates. It belongs to the kingdom Animalia and…
Q: How is lozenge eye in drosophila an example of pseudoallelism?
A: Pseudoalleles are formed by duplication of a gene which further evolved to develop new functions.…
Q: Which Position-effect variegation in Drosophila?
A: Drosophila are known as the fruit flies that are importantly used as a model organism in the genomic…
Q: Illustrate the chromosomes in the salivary gland of Drosophila melanogaster
A: Drosophila melanogaster have polytene chromosome in their salivary gland.
Q: Name one trait each in humans & in drosophila whose genes are located on sex chromosome.
A: In both humans and Drosophila, the female possesses two homomorphic sex chromosomes i.e., XX and the…
Q: Mutating the gene Transformer (tra) in Drosophila that is chromosomally XX leads to the development…
A: A mutation is a change in an organism's DNA sequence. Mutations can occur as a result of mistakes in…
Q: What would you predict to be the phenotype of a Drosophila larva whose mother was homozygous for a…
A: Drosophila melanogaster is a common fruit fly. It is most common subject used in majority of genetic…
Q: How Drosophila Mutations that Affect the Two Sexes Differently?
A: Drosophila is a vastly studied organism, especially when it comes to genetic studies. XX makes the…
Q: Describe the major difference between sex determination in Drosophila and in humans.
A: Drosophila melanogaster refers to the fruit fly which is widely used in genetic research as it has…
Q: Explain how polytene chromosomes of Drosophila are produced and how they form a six-armed structure?
A: Polytene chromosomes are large chromosomes that have thousands of DNA strands. They provide a high…
How do we know that Drosophila utilizes a different sexdetermination
mechanism than mammals, even though it has the
same sex-chromosome compositions in males and females?
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- Outline the molecular mechanism of sex determination in Drosophila and mammals.What specific observations (evidence) support the conclusions about sex determination in Drosophila and humans?Why is it that mutations in bicoid and nanos exhibit genetic maternal effect in Drosophila (a mutation in the maternal parent produces a phenotype that shows up in the offspring), but mutations in runt and gooseberry do not?
- Explain the X-Linkage in Drosophila ?What possible conclusions can be drawn from the observations that in male Drosophila, no crossing over occurs, and that during meiosis, synaptonemal complexes are not seen in males but are observed in females where crossing over occurs?In Drosophila subobscura, the presence of a recessive gene called grandchildless (gs) causes the offspring of homozygous females, but not those of homozygous males, to be sterile. Can you offer an explanation as to why females and not males are affected by the mutant gene?
- How many gametes of differing genotypes can a female drosophila of genotype ABC/abc produce? How many gametes of differing genotypes can a male drosophila of genotype ABC/abc produce?What gametes, and in what frequencies, are produced by a female Drosophila of genotype A B / a b when the genes are present in the same chromosome and the frequency of recombination between the genes is 8 percent?Barr bodies are formed to adjust X chromosome dosage in species other than humans, such as Drosophila (fruit flies) and C. elegans (nematodes). True or False ?