Q: How long is Drosophila melanogaster life cycle?
A: The Drosophila melanogaster is the widely used model organism in the field of genetics and…
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: Where are Drosophila melanogaster found?
A: Drosophila belongs to the family Drosophilidae, whose members are commonly called as small fruit…
Q: What Proteins make up the kinetochore?
A: A chromosome is a thread like structure present within the living cells. It contains the genetic…
Q: Maleness and Male Fertility Are the OnlyKnown Y-Linked Traits in Humans Explain?
A: Humans have an XX-XY type of chromosomal determination of sex. Females possess two homomorphic or…
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: A Drosophila embryo dies during early embryogenesis due to arecessive allele of a maternal effect…
A: Phenotypes and genotypes represents the traits that gets passed on from the parents to the progeny.…
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: Why is the gene for eye color in drosophila present on the X chromosome ?
A: Gene is the basic unit of heredity for all life forms. It is transferable from one generation to its…
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: 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: If a mother snail is heterozygous, Dd, which gene products will the oocyte receive?
A: The mom's genotype specifically influences her offspring's phenotype Broken rule: gene expression an…
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: In Drosophila subobscura, the presence of a recessive gene called grandchildless (gs) causes the…
A: The grandchildless is an autosomal recessive condition (gs/gs). The males of the Drosophila…
Q: You cause a mutation in the bicoid gene in a Drosophila embryo. What effect will this have on this…
A: The members of Drosophila are called "fruit flies." Drosophila embryogenesis is the process by which…
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: 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: The human RGS10 gene is found on Chromosome 10. How many copies of RGS10 does one egg gamete have,…
A: The meiotic cell division is a process that takes place exclusively during the phenomenon of Sexual…
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: Outline the molecular mechanism of sex determination in Drosophila and mammals.
A: Sex determination refers to determining the sex of an individual. The sex of an organism is…
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: 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: Using Drosophila notation: A.) Diagram the genotype of a female fly that is recessive for apterus…
A: Homozygous means both the alleles will be same and heterozygous means both the alleles will be…
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: 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: Determines Sex in Drosophila?
A: Drosophila melanogaster is a common fruit fly. It is most common subject used in majority of genetic…
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: What is positional information? What are three different ways that cells obtain positional…
A: Development is a continuous change in shape, size, and function, throughout the life of an organism.…
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: How does sex determination in Drosophila differ from sex determination in humans?
A: Sex determination is a method for determining the sexual characteristics within an organism. These…
Q: Distinguish between the syncytial blastoderm stage and the cellular blastoderm stage in Drosophila…
A: Both the syncytial and cellular blastoderm are early developmental stages of Drosophila. The…
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: How do we know that Drosophila utilizes a different sexdetermination mechanism than mammals, even…
A: A chromosome is a compact form of DNA molecule present in dividing cells. In metabolically active…
Q: Name the sex chromosomes in human males and females.
A: Chromosome theory of sex determination or sex chromosome mechanism was discovered by EB Wilson and…
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: List the stages of Drosophila development.
A: Drosophila is a fly that belongs class insecta and order diptera of Animal kingdom. It is commonly…
Q: A new recessive mutant allele doesn’t show pseudodominance with any of the deletions that span…
A: Pseudodominance is defined as the sudden appearance of the phenotype of a recessive gene in a…
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…
Q: Why does the sex chromosome X carry the gene for eye color in Drosophila?
A: The mode of inheritance is a pattern of obtaining parentral alleles or genes to the offsprings. The…
Q: If the HoxA3 and HoxD3 genesare equivalent, how do you suppose they can play suchdistinct roles in…
A: Gene is the structural and functional unit in the DNA. Genes are composed of nucleotide nitrogenous…
Which sex chromosome (X or Y) carries the gene for eye color in Drosophila?
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- In Drosophila, the X chromosomes may become attached to one another (XXn ) such that they always segregate together. Some flies thus contain a set of attached X chromosomes plus a Y chromosome. (a) What sex would such a fly be? Explain why this is so. (b) Given the answer to part (a), predict the sex of the off-spring that would occur in a cross between this fly and a normal one of the opposite sex. (c) If the offspring described in part (b) are allowed to interbreed, what will be the outcome?A male Drosophila with wild-type phenotype is discovered to have only seven chromosomes, whereas normally 2n = 8. Close examination reveals that one member of chromosome IV (the smallest chromosome) is attached to (translocated to) the end of chromosome II. If this male mates with a female with a normal chromosome composition who is homozygous for the recessive chromosome IV mutation eyeless (genotype = ee), what would be the eye genotypes, eye phenotypes, and total number of chromosomes in all potential offspring if the male is homozygous for the wild-type allele (EE)? put a table for punnet squareA male Drosophila with wild-type phenotype is discovered to have only seven chromosomes, whereas normally 2n = 8. Close examination reveals that one member of chromosome IV (the smallest chromosome) is attached to (translocated to) the end of chromosome II. If this male mates with a female with a normal chromosome composition who is homozygous for the recessive chromosome IV mutation eyeless (genotype = ee), what would be the eye genotypes, eye phenotypes, and total number of chromosomes in all potential offspring if the male is homozygous for the wild-type allele (EE)?
- Human sex chromosomes are XX for females and XY for males. a. With respect to an X-linked gene, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele? c. If a female is heterozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele?A male Drosophila melanogaster has the genotype A/a; B/b; C/c; XD/Y (all genes are on separate chromosomes). How many different sperm genotypes can it produce through meiosis of one single pre-gametic (2n) cell? (remember, there is no crossing over in male Drosophila) Explain.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?
- Shown (the picture) is a partial gene map for Drosophila melanogaster. In Drosophila, vermillion eyes are recessive (v) to red eyes (V) and the gene resides on chromosome 1; dumpy wings (d) are recessive to normal wings (D); and speckled body (s) is recessive to normal body (S). The dumpy wing gene and the speckle body gene are linked on chromosome 2 and have 7 map units separating them. Assume that chromosome 1 and 2 are autosomal chromosomes and that there are no known interactions between the genes. In an experiment, an undergraduate student crossed pure breeding males that have red eyes, normal wings, and normal body with pure breeding females who have vermillion eyes, dumpy wings, and speckle body to obtain an F1. Using the Drosophila gene map, answer the following questions: a. What fraction of the F1 gametes will contain the alleles for red eyes, normal wings and speckle body? b. In a cross between an F1 flies and a tester, what fraction of the offspring do you expect to have…Using Drosophila notation: A.) Diagram the genotype of a female fly that is recessive for apterus (ap, chromosome 2), heterozygous wild-type for black (b, chromosome 2), recessive for forked (f, x-chromosome), and homozygous wild type for rosy (ry, chromosome 3). B.) Diagram the genotype of a male fly that is heterozygous for clot (ct) eyes (an autosomal gene) and has yellow (y) body color (x-linked gene).Consider a Droscophilia fly with a genotype of Nn XqYY. The dominant allele of the sex-linked gene specifies a black body and the recessive a white body. The recessive autosomal allele specifies hairy bristles while the dominant allele specifies smooth bristles. i)What is the ploidy of this fly? ii) What would the sex of this fly be? iii)What would the phenotype of this fly be with respect to these two loci?