Q: Explain the X-Linkage in Drosophila ?
A: X-linkage is the sex linkage that involves X chromosome. X linkage is the genetic factor or gene…
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 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: 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: The reason of X-linked inheritnce was first explained by----------while working on Drosophila.(A)…
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: Why is the development of individuals with Klinefelter's and Turner's syndromes relatively normal,…
A: This syndrome occur due to presence of an additional copy of X chromosomes resulting into karyotype…
Q: Which sex chromosome (X or Y) carries 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: White eye color is a recessive sex-linked trait in fruit flies. If a whiteeyed Drosophila female is…
A: Genes are the hereditary unit of an organism. The DNA (deoxyribonucleic acid) forms the genes. DNA…
Q: In humans, hemophilia is an X-linked recessive gene and will only be expressed in females if they…
A: Hemophilia is a X linked recessive disorder so which is inherited in homozygous condition. In rare…
Q: How are linked genes similar to sex-linked genes? How are they different?
A: The term gene was derived from the Greek word meaning generation. It is the basic hereditary unit of…
Q: Why dominant negative mutation shows the haploinsufficiency ?
A: A mutation is a change that occurs in our DNA sequence, either due to mistake when the DNA is copied…
Q: What are genes located on the same chromosome?
A: Genetic recombination refers to the rearrangement of DNA sequences by the breakage and rejoining of…
Q: How do we know that specific genes are located on the sexdetermining chromosomes rather than on…
A: Chromosomes are coiled structures made of DNA and proteins called histones. Chromosomes are the form…
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: 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: why are certain genes just expressed in the mother and not in the father or vice versa?
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: Another recessive mutation in Drosophila, ebony (e), is on anautosome (chromosome 3) and causes…
A: The scalloped wing phenotype is produced due to a recessive mutation in the X chromosome. The…
Q: What is a Barr body? How is its structure different from that ofother chromosomes in the cell? How…
A: Chromosomes are the carrier of genetic material deoxyribonucleic acid (DNA). They are coiled in…
Q: How is it that asymmetric cell division influences gene regulation? What are the factors that…
A: The mechanism by which a parent cell splits into two or more daughter cells is cell division. As…
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: Which sex chromosome (X or Y) carries the gene for eye color in Drosophila? Why?
A: Red eye colour is dominant over white eye colour in drosophila.
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: 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: In humans, why is it that the mother determines whether her sons will get recessive sex-linked…
A: Human X and Y chromosomes determine the biological sex of a person. XX specifies female and XY…
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: How are the genes on the X chromosome regulated?
A: Males have just one copy of the X chromosome, whereas females have two copies. There is evolutionary…
Q: Why are there so few Y-linked traits in humans?
A: The study of genetic variations, heredity, and genes is called genetics.
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: Chorionic villus sampling is a procedure to determine if there are any abnormalities in chromosome…
A: Chorionic villus sampling is also used for the same purpose. Chorion is basically a membrane that…
Q: Explain how human cells compensate for the X-linkedgene dosage difference in XX and XY nuclei.
A: A sex chromosome is a chromosome that differs from an ordinary autosome in form, size, and behavior.…
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: Determines Sex in Drosophila?
A: Drosophila melanogaster is a common fruit fly. It is most common subject used in majority of genetic…
Q: Why do some genes express themselves later in life? Why not earlier? How many chromosomes in a human…
A: Some genes are expressed later and not earlier:Gene expression is defined as the process by which…
Q: Some individuals grow ear hair later in life, the gene for this trait is beleived to be carried on…
A: The phenotypic expression is the ultimate product of a gene. All of our phenotypic characteristics…
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: Occasionally, a mouse X chromosome is broken into two pieces and each piece becomes attached to a…
A: Chromosomes are thread-like structures situated inside the nucleus of plant and animal cells. Each…
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: What is the difference between sex determination in mammals and in Drosophila?
A: Sex determination is the process of identification of different sex that is male and female, in…
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: 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…
Why is the gene for eye color in drosophila present on the X chromosome ?
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- 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?Vermillion eye color in Drosophila sp. is a sex-linked recessive trait. What phenotype would be found in this progeny of a cross between a vermillion female and a wild type male?Vermilion eye color in Drosophila is sex-linked and recessive. What would be the phenotypes of maleand female progenies of a cross between a vermilion female and wild-type (red) male?
- Why is it that so many of the sex-linked traits we talk about in humans are carried on X chromosomes - but are expressed mostly in males?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 ?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?
- Why are the linked genes similar to sex-linked genes? Also how are they different?White eye color is a recessive sex-linked trait in fruit flies. If a whiteeyed Drosophila female is mated with a red-eyed (wild-type) male, what do you predict for the numerous offspring?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?