Q: Are all of the cell nuclei in the embryo sac haploid or is just the egg haploid?
A: The group of organisms with eukaryotic cells having cell walls and autotrophic nutrition are called…
Q: Explain why maternal effect genes exert their effects during theearly stages of development
A: Gene is a functional unit of heredity. A gene is a sequence of nucleotides in genome that codes for…
Q: What is redeployment in developmental biology?
A: Evolution describes the gradual transformation of organisms from their rudimentary beginnings to…
Q: If a fertilized Drosophila egg is punctured at the anterior end and a small amount of cytoplasm is…
A: Egg polarity genes are the earliest activated genes, which decide the formation of main body axis;…
Q: How are mammalian extraembryonic membranes formed?
A: The layers encircling the embryo inside the uterus are known as extraembryonic membranes. The…
Q: What is delayed implantation? Why is it important in marine mammals?
A: It is a reproductive strategy used by approximately 100 different mammals in seven or eight…
Q: How is it that the embryo sacs of some apomictic species look normal but contain diploid cells?
A: Apomictic species are the ones that undergo asexual production of a seed from the ovule's maternal…
Q: How important is cell adhesion for the development of mammalian embryo?
A: The fusion of male and female gametes results in the formation of a single-cell zygote. The zygote…
Q: What are some of the major impediments to genetically modifying human embryos?
A: Genetic sequences of the organisms regulate their genetic traits.
Q: which animal has 92 chromosomes?
A: Chromosomes are defined as the thread-like structures present in the nucleus of organisms. Nucleic…
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: What cell exports large amount of RNA to the oocyte?
A: Oocyte refers to the cell present within the ovary, which gets developed to form an ovum by…
Q: Describe the role of the SRY gene in mammalian sexual development.
A: The human male genital or reproductive system has two sections, the external and internal male…
Q: Who discovered Drosophila melanogaster?
A: Drosophila belongs to the family Drosophilidae, whose members are commonly called as small fruit…
Q: With regard to early cleavage in the sea urchin, is the entire zygote involved in early cleavage
A: Introduction:- A sea urchin is a spiny marine creature with a globular body and a radial arrangement…
Q: Why are blastomeres in the pigmented part of the egg smaller and more numerous than in the…
A: The other terms associated with developmental biology include embryogenesis or embryology. This…
Q: Illustrate the top-to-bottom and head-to-tail orientation of the fruit fly embryo.
A: The fruit fly is known as Drosophila melanogaster is a common fly found on fruits like ripe bananas.…
Q: Suppose you are analyzing the DNA from the polar bodies formed during human oogenesis. If the woman…
A: The process of the development of an oogonium into a mature ovum is termed oogenesis. It involves…
Q: how would the chromosomes content of the eye cell of a man compare with the chromosome content of…
A: Chromosomes are thread like structures that are the condensed form of DNA. They constitute the…
Q: Explain Segment identity is preserved throughout development?
A: Drosophila is a genus of small flies whose members are often called fruit flies. It has segmented…
Q: What is meant by “induction” in embryology? Describe the famous organizer experiment of Spemann and…
A: Embryonic development refers to the development and formation of the embryo. It is characterized by…
Q: What parts are persistent throughout the development of the embryo? Why are these present in all the…
A: The fitness of the organism depends on the early stages of embryonic development, which include…
Q: Explain how Hox gene expression affects vertebrate development.
A: Hox genes are a set of transcription factor genes that are responsible for the development of…
Q: Most mammals, including humans have alecithal type of egg, which means that there is negligible or…
A: In lower organisms the yolk provides the nourishment to the growing embryo. But in mammals the…
Q: Can sperm with DNA fragmentation fertilize an egg?
A: The process that involves fusion of the male and female gametes namely sperm and ovum respectively…
Q: why do the embryos of different species resemble each other?
A: The embryo is an early stage of development in multicellular organism (from fertilization to start…
Q: What are some master genes important in embryonic development?
A:
Q: If you observed fruit flies with the following developmental abnormalities, would you guess that a…
A: Step 1 Homeotic genes are the master regulators genes that control the development of a particular…
Q: What are the types of uteri found in mammals? Describe each.
A: Introduction The degree to which the uterine horns are developed constitutes the classification of…
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: Where is the specific location in an animal where cells are undergoing Meiosis?
A: Meiosis is process of cell division. During meiosis process cell divides into four daughter cells…
Q: Why are the chromosomes replicating? Why is this necessary for the embryo?
A: The fundamental importance of chromosomes is that they contain DNA, or deoxyribonucleic acid, the…
Q: You inject bicoid MRNA into the posterior end of a fertilized fruit fly egg just prior to the first…
A: Drosophila refers to the genus of flies that is commonly called fruit flies. It is a small fly seen…
Q: Explain the wingless and hedgehog feedback mechanism that is used to pattern the fly embryo.
A: ANSWER;-The wingless & hedgehog that is used to pattern the fly embryo. Wingless:- Its earliest…
Q: Give an analogy on how the concepts of determination and differentiation are seen in personal events…
A: During the early embryonic development , the cells are said to be totipotent because of their…
Q: why does a high concentration of Abscisic acid (ABA) inhibit elongation of the coleoptile segments?
A: According to the question, we have to explain the reason behind the inhibition of elongation of…
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: How does a constant genome produce various cell types during embryogenesis?
A: Embryogenesis: Embryogenesis is the process of a zygote developing into a foetus. Embryonic…
Q: Suppose that, at the time a human zygote is undergoing cleavage, the first two plastomeres that form…
A: The terms identical and fraternal don't describe what the twins look like, but actually how they…
Q: What controls hox genes expression in vertebrates?
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: Discuss the role of par genes in generating anterior/posterior polarity in the C. elegans embryo.
A: C. elegant is a nematode that is used as a model organism in developmental research. Six proteins…
Q: Could it be that lineage-restricted multipotent stem cells are derived from acNeoblast and seeded…
A: In cell biology, functionally and structurally limited cells to behave in a differentiated manner…
Q: Why must animals usually be modified in the embryo stage toarrive at successful outcomes?
A: Transgenesis is a technique of incorporating a gene or transgene in the genome of an organism taken…
Q: How many stages of cleavage are there in sea urchin
A: Sea urchins go through radial cleavage, like chordates, ascidians, and different echinoderms. Like…
Why do mammalian embryos need both a maternal and a paternal genome?
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- Why does a mouse embryo develop faster than a human embryo, for example?In animal phyla with radial cleavages, cell fate of the embryo is?If a fertilized Drosophila egg is punctured at the anterior end and a small amount of cytoplasm is allowed to leak out, what will be the most likely effect on the development of the fly embryo?
- Scientists have cloned some animals by injecting a nucleus from an early embryo into an enucleated egg cell. Does this outcome demonstrate that genetic material is not lost during development? Why or why not?why do the embryos of different species resemble each other?what is the process which involves in the self-destruction of cells in the developing embryo as shown in the disappearance of the embryo’s tail?
- What would happen if one cell was removed or damaged at the 2-cell stage of sea urchin embryo development? What about if one cell was removed at the 4-cell stage? At the 8-cell stage? How about if two cells were separated after the first cleavage and allowed to develop on their own?During embryogenesis, how do segments become different that one another?How does a constant genome produce various cell types during embryogenesis?