Q: Y Why is fetal Hb essential for the survival ofplacental animals?
A: Hemoglobin is an oxygen transport protein in mammals. It is made up of four subunits. Adult…
Q: Explain the molecular mechanism of maternal effect.
A: The genes that are responsible for showing non-mendelian inheritance are found outside the nucleus…
Q: At which stage of development does XCI initially occur?
A: In many species, genes located on the sex chromosome determined the sex of an individual. In…
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: 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: What generates the first differences among cells in an early embryo? And what controls the…
A: Embryonic differentiation refers to the process in which embryonic cells possess specialization and…
Q: What is the rationale behind the cleavage stages undergone by the early embryo?
A: Cleavage: The series of synchronized mitotic cell divisions of the fertilized egg that results in…
Q: Outline the postfertilization events that lead to formation of a blastocyst.
A: Reproduction is the phenomenon of producing offspring from the parent. The reproduction can be…
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: What is the significance of cleavage during the early stages of development?
A: The cleavage is the division of cells in the early stage of an organism. This implies that with each…
Q: What experimental evidence demonstrates that molecular gradients in the egg control development?
A: Morphogens: A substance that standardize a graded distribution and elicit distinct cellular…
Q: is no fertilization, oocyte will arrested at?
A: OOCYTE_ An oocyte, is a female gametocyte or germ cell involved in reproduction. In other words, it…
Q: How is the polar body formed in a way that the oocyte retains most of the cytoplasm? And how do…
A: Polar bodies serve to eliminate one portion of the diploid chromosome set delivered by meiotic…
Q: How are the development events, which you have observed to occur in the testis and ovary,…
A: The initial processes of gonads development are essentially similar in both sexes consisting of…
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: Differentiate the primitive streak of the 24-hour from the primitive streak of the 18-hour
A: Primitive Streaks and its peculiar shape at various stages--- Primitive streak is very important…
Q: Describe the role of pregnancy hormones during human pregnancy. What hormones prepare the mammary…
A: Several hormones are secreted from the placenta to maintain the pregnancy and to prepare the body…
Q: Is there a exchange of cells between the mother and the fetus through the placenta?
A: We have to explain whether there is an exchange of cells taking place through placenta.
Q: How do the amount and distribution of yolk influence gastrulation?
A: Gastrulation is a process in which the single layer of cells called blastula is arranged into a…
Q: : What is the difference between the G0 and G1 phases?
A: Interphase is the interval between two successive cellular divisions especially in eukaryotic cells…
Q: What is the cell divisionduring the first stage of theembryonic developmentcalled? How is this…
A: The process by which a parent cell divides into two identical daughter cells, is called Cell…
Q: What is meant by the term “activation” in embryology?
A: Embryology is a branch of biology. It is the study of formation, growth as well as the development…
Q: What is G1 (first gap) phase.
A: The cell division process is required in the body for a wide variety of purposes like Growth,…
Q: Explain how egg rotation and gravity determine anterior posterior patterning in chick embryos
A: Anterior posterior pattern formation is the regionalization process in which specific areas of cell…
Q: what does a oogenesis concept map with 10 words or phrases look like?
A: oogenesis concept map :-
Q: If β-catenin is originally found throughout the embryo, how does it become localizedspecifically to…
A: The Wnt pathway is one of the signal transduction pathways that are involved in the developmental…
Q: Does the distribution of Ca²+ in an egg correlate with formation of the fertilization envelope?
A: During fertilization, sperm-induced rise in cytoplasmic Ca2+concentration.
Q: How do the mechanisms of fertilization ensure control of both quality (fertilization by a sperm of…
A: Fertilization is the process of fusion of haploid gametes to form diploid zygotes. The zygote…
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: If Ca2+ from the egg’s endoplasmic reticulum is responsible for the cortical granule reaction and…
A: Reproduction is the process of production of own kinds.
Q: What is oogenesis? Give a brief account of oogenesis.
A: The female reproductive organs comprise primary sex organs (ovaries) as well as accessory sex…
Q: What would happen if human chorionic gonadotropin levels did not rise adequately during pregnancy?
A: Hormones are chemical messengers secreted by the glands present in the body. They are responsible…
Q: What are the distinguishable parts of the 72-hour chick embryo? Give at least 5 parts and the adult…
A: Probably the best magical occurrence of nature is the change of the egg into the chick. A chick…
Q: What are the three germ layers formed during gas-trulation, and what are the principal structures…
A: Introduction :- Gastrulation is a process in which an embryo converts from a one-dimensional layer…
Q: what is celluar cleavage thats occur in the early stages of development?
A: The development of an embryo is characterized by the process of cell division and cellular…
Q: How do fruit fly maternal effect genes determine thepolarity of the egg and the embryo?
A: Drosophila melanogaster is generally known as the common fruit fly. It belongs to the family…
Q: What is the significancw of cleavage in early development? Discuss.
A: The repeated mitotic divisons of the fertilized egg (zygote) is called cleavage. It is preceeded by…
Q: What means to retain the ability to become any cell type—including germ-line cells and gametes—when…
A: Stem cells are the cells that are capable to convert to different cell types. These are present in…
Q: Give the approximate length of the various parts of the oviduct of a female chicken including its…
A: The different parts of oviduct of a female chicken along with their length are: Infundibulum: 2…
Q: What result would Jost have obtained if female development alsorequired a signal from the gonad?
A: Endocrine system is a regulatory system of ductless glands that secrete chemical messengers called…
Q: How are genes turned on and off in embryological development?
A: One way cells regulate their genes is by DNA methylation, in which a molecule known as a methyl…
Q: Briefly discuss the role of hormonal system in the release of bovine eggs for in vitro fertilization
A: In vitro fertilization (IVF) is a procedure in which eggs are removed from a female's ovaries and…
Q: How many follicle cells will fit inside? Is there an abundance of yolk within the cytoplasm of the…
A: Oocyte It is an immature ovum or egg cell which is a female gametocyte or germ cell. It is involved…
Q: What is indirect development?
A: Development involves the functional and physiological maturation of an individual. It is a…
Q: Are different stages of development tend to generate differences in stimulating cleavage and…
A: Cleavage -- Term cleavage is defined as a series of rapid mitotic division of zygote after…
Q: How does distribution of the gray crescent affectthe developmental potential of the first two…
A: Introduction: Gray crescent is a cortical region present in the egg of the frog that is recently…
Does the distribution of Ca21 in an egg correlate
with formation of the fertilization envelope?
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- Does the distribution of Ca²+ in an egg correlate with formation of the fertilization envelope?How is and egg (oocyte) prepared during oogensis for fertilization? Why is preparation essential to development?How is an egg (oocyte) prepared during oogenesis for fertilization? Why is preparation essential to development?
- 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?If Ca2+ from the egg’s endoplasmic reticulum is responsible for the cortical granule reaction and the reactivation of development, what releases Ca2+?How might the asymmetry of an embryo change if after fertilization its moved to a restrictive temperature.
- What are the distinguishable parts of the 72-hour chick embryo? Give at least 5 parts and the adult derivatives of each part.Neurulation in model vertebrates and in fly follows soon after gastrulation.Do vertebrates and fly-related invertebrates adopt different strategies forneural development, both at the cellular and molecular level?What experimental evidence demonstrates that molecular gradients in the egg control development?