Q: Describe how a biparental pattern of extranuclear inheritancewould resemble a Mendelian pattern of…
A: Inheritance is the transmission of traits from one generation to the next.
Q: 3.9 Which mode of inheritance is suggested by the fol- lowing pedigree? Based on this hypothesis,…
A: Pedigree is a diagrammatic representation of either phenotypes or genotypes of a particular organism…
Q: What is the difference between a maternal-effect gene and a zygotic gene? Of the following genes…
A: Genes are the basic biological unit of heredity. They are a segment of deoxyribonucleic acid (DNA)…
Q: When an embryo is homozygous mutant for the gap gene Kr, the fourth and fifth stripes of the…
A: Segmentation in the Drosophila embryo is regulated by pair-rule genes and gap genes.
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: The inheritance of short wings in Drosophila iruit nles is an X- IIhked, recessive trait. Which…
A: wild type-normally found in nature Mutant type-one with random mutations
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: Compare and contrast how maternal-effect genes, gap genes, and homeotic genes affect Drosophila…
A: Homeotic genes are the class of genes present in Drosophila that direct the development of the…
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: Which of the following conditions are required for the Eve protein to be expressed in the cells that…
A: Apoptosis is defined as a form or type of programmed cell death that will occur in multicellular…
Q: Describe the formation steps of the primary axis that first occurs during development in Drosophila…
A: Embryos produce different types of cells and functional tissues and organs are formed by these cells…
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: a. Explain the difference between maternal inheritanceof organelle DNAs and maternal effect…
A: There are two types of sex chromosomes X and Y chromosomes. The autosomes are the same in both male…
Q: A maternal effect gene in Drosophila, called torso, occurs as a functionalallele (torso+) and a…
A: Drosophila consist of acorn-head-thorax-abdomen-telson part.
Q: What are haploidentical paternal regions?
A: Haploidentical transplant is a type of allogeneic transplant. It is a half matched stem cell…
Q: What is the explanation for maternal effect inheritance at the molecularand cellular level?a. The…
A: maternal inheritance is also known as cytoplasmic inheritance or extra nuclear inheritance it occurs…
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 role does induction play in development?
A: Induction is the developmental process by which specific tissue types affect the development of…
Q: In the Fast Forward Box Visualizing X ChromosomeInactivation in Transgenic Mice, suppose the…
A: Transgenic mice are the animal models that are used to study the functions of a specific gene by…
Q: X inactivation explains the large color patches in calico cat fur and the smaller patches in…
A: The calico and tortoiseshell cats are named for their cat coloring. The cat genes are usually…
Q: Suppose someone identifies a “gene for” certain aspects of development. How might that statement be…
A: A gene is a specific sequence of nucleotides of a DNA that is expressed. While DNA is found inside…
Q: A maternal effect gene in Drosophila, called torso, is found as afunctional allele (torso+) and a…
A: Maternal effect gene is an effector gene in which the phenotype of an offspring is determined by the…
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: Morphogens play a key role in development, cre-ating concentration gradients that inform cells of…
A: Introduction Life starts from a single cell called Zygote. A zygote is formed by the fusion of the…
Q: In drosophila embryos that are null mutants for hedgehog (hh'/hh), expression of which of the…
A: In drosophila, segment polarity genes are those genes which act to specify the correct pattern of…
Q: A Drosophila embryo dies during early embryogenesis due to arecessive maternal effect allele called…
A: The kind of inheritance in which, the characters do not separate according to the laws of Mendel is…
Q: What are haploidentical maternal regions?
A: Haploidentical transplant is a type of allogenic transplant. It is a half matched stem cell…
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: gap genes, pair rule genes, segment polarity genes, and homeotic genes in Drosophila development.
A:
Q: In Drosophila, gray body color is dominant over ebony body color,while long wings are dominant over…
A: Genetic study experiments of Drosophila Gray body colour- dominant - E Ebony body colour-…
Q: How many number of genes a Mouse (Mus musculus) has ?
A: The study of genomes' design, functioning, development, sequencing, and modification is the core of…
Q: The maternal-effect mutation bicoid (bcd) is recessive. Inthe absence of the bicoid protein product,…
A: Introduction: Bicoid (Bcd) protein is a product of the bicoid gene having a maternal effect and is…
Q: In Table 13-1, what is the most common function of proteins that contribute to pattern formation?…
A: Drosophila melanogaster, a fruit fly, is utilised as a model organism in research spanning from…
Q: What are some master genes important in embryonic development?
A:
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: Why have geneticists used reverse genetics to study the genes involved in vertebrate development?…
A: Reverse genetics is an approach where the function of a gene is identified by analysing the…
Q: What is developmental homology?
A: Meaning of developmental homology Anatomical similarity due to derivation from a common…
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: List the factors believed to cause the wide variance between the maternal andbetween the maternal…
A: The fetus is connected to the mother with the help of an umbilical cord. The exchange of food, and…
Q: What is the pseudoautosomal region? How does the inheritance of traits encoded by genes in this…
A: Small nucleotide stretches present on DNA molecules that encode information for the…
Q: What are some master genes important in embryonic development? Discuss.
A: INTRODUCTION HOX gene HOX genes are the master gene involved in embryonic development in animals.…
Q: At the molecular level, what is the explanation for whythe four-o’clock flowers are pink instead of…
A: The complete set of genetic instructions of an organism is called the genome. A gene is a sequence…
Q: How does the evolutionary relationship between mice and humans overcome some of the difficulties in…
A: In human and mice physical similarities are Available.Also they are genetically similar. In clinical…
Q: Describe the expression pattern of the Drosophila geneeve in the early embryo.
A: Drosophila development involves the specification of early embryonic cells by various cytoplasmic…
Q: In Drosophila, the yellow (y) gene is near the telomereof the long arm of the acrocentric X…
A: In Drosophila, the yellow (y) gene is present close to the acrocentric X chromosome, whereas, the…
Q: Discuss how the anterior portion of the anteroposterior axis is established in Drosophila. What…
A: Genes come in pairs and are responsible for the inheritance and expression of the associated…
If the HoxA3 and HoxD3 genes
are equivalent, how do you suppose they can play such
distinct roles in development?
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Solved in 3 steps
- What would be the most likely effect on development of puncturing the posterior end of a Drosophila egg, allowing a small amount of cytoplasm to leak out, and then injecting that cytoplasm into the anterior end of another egg?A Drosophila embryo dies during early embryogenesis due to arecessive allele of a maternal effect gene called bicoid. The wildtypeallele is designated bicoid +. What are the genotypes and phenotypesof the embryo’s mother and maternal grandparents?Explain hoxA3 and HoxD3 genes are nearly equivalent yet they play distinct roles in the development of mouse.
- Morphogens play a key role in development, cre-ating concentration gradients that inform cells of wherethey are and how to behave. Examine the simple patternsrepresented by the flags in Figure Q21–1. Which do yousuppose could be created by a gradient of a single mor-phogen? Which would require gradients of two morpho-gens? Assuming that such patterns were present in a sheetof cells, explain how they could be created by morphogens.A Drosophila embryo dies during early embryogenesis due to arecessive maternal effect allele called bicoid−. The wild-type alleleis designated bicoid+. What are the genotypes and phenotypes ofthe embryo’s mother and maternal grandparents?Which Position-effect variegation in Drosophila?
- In Drosophila, gray body color is dominant over ebony body color,while long wings are dominant over vestigial wings. Work thefollowing crosses through the F2 generation, and determine thegenotypic and phenotypic ratios for each generation. Assumethat the P1 individuals are homozygous: (a) gray, long * ebony,vestigial, and (b) gray, vestigial * ebony, long, and (c) gray,long * gray, vestigial.Name three possible factors contributing to early asymmetries in a developing embryo (i.e. what are the kinds of things early on that lead to the development of the body axes - dn, a/p, l/r, etc)? In the fruit fly drosophila melanogaster, the anterior-to-posterior body axis becomes segmented into distinct regions. explain the role of the genes bicoid and nanos in this process.You isolate a glp-1 mutation of C. elegans and discoverthat the DNA region encoding the spatial control region(SCR) has been deleted. What will the GLP-1 protein expression pattern be in a four-cell embryo in mutant heterozygotes? In mutant homozygotes?
- Two hedgehog parents are heterozygous at the spiny locus, each with genotype Ss. This locus affects the length of the individuals’ spines, which ranges from 1 cm in SS homozygotes to 3 cm in ss homozygotes.Inheritance of spine length in this family is entirely due to the spiny locus and it exhibits additivity. Remember that development of spines depends on thousands of genes, but we’re only considering this one gene because it’s the one that varies in a way that affects spine length in this family. a) List all of the phenotypes we could observe among offspring of these Ss heterozygote parents. b) What’s the probability that an offspring of these heterozygous parents is an SS homozygote? c) If the parents have exactly two offspring, what is the probability that the two hedgehog kids have no alleles in common? In other words, what’s the probability that one kid is SS and the other ss?How have we discovered that specific genes control development in an organism like Drosophila?In Drosophila, a heterozygous female for the X-linkedrecessive traits a, b, and c was crossed to a male that phenotypically expressed a, b, and c. The offspring occurred inthe following phenotypic ratios.+ b c 460a + + 450a b c 32+ + + 38a + c 11+ b + 9 No other phenotypes were observed.(a) What is the genotypic arrangement of the alleles ofthese genes on the X chromosome of the female?