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: What parts are persistent throughout the development of the embryo? Why are these present in all the…
A: Answer
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: Where are Drosophila melanogaster found?
A: Drosophila belongs to the family Drosophilidae, whose members are commonly called as small fruit…
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: 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 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: With regard to development, what are the roles of the maternaleffect genes versus the zygotic genes?…
A: Maternal-effect is a phenomenon in which the phenotype of the offspring is defined by the genotype…
Q: What are homeotic genes and what is the “homeobox” contained in such genes?
A: A gene can be defined as the physical and functional unit of the hereditary. Genes consists of…
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 is the chromosomal system for determining sex in mammals?
A: Chromosomal determination of sex It is also known as allosomic determination of sex and is based on…
Q: Describe two ways that an oocyte avoids polyspermy.
A: The fertilization of the egg takes place by the fusion of the sperm and the ovum. Sperm is produced…
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A: Delayed parenthood has increasingly adverse effects on reproduction. In an older male, sperm quality…
Q: State the neuromere origin of each brain region?
A: Introduction Neuromeres Are Known As The Segments Of The Neural Tube That Forms The Embryonic Brain…
Q: causes a deletion to occur during early fetal development.? is it an alteration
A: If there is deletion or Insertion of one or a few nucleotides in the DNA molecule, then it will…
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: 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: 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 cell exports large amount of RNA to the oocyte?
A: Hi! Thanks for your question. But as you have posted multiple questions, I am answering the first…
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: 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: What is the difference between direct and indirect development?
A: Development refer to the process of the formation of the adults from the progeny stage. There are…
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 are haploidentical maternal regions?
A: Haploidentical transplant is a type of allogenic transplant. It is a half matched stem cell…
Q: what does a "fetal development" concept map look like with 10 words or phrases?
A: Fetal development in shortest words.
Q: What happens when Wnt4 genes are activated? What gonads developed?
A: Wnt4 proteins are encoded by Wnt genes which are present on chromosome number 1. Presence of Wnt4…
Q: What role do homeotic genes play in the development of fruit flies?
A: Drosophila melanogaster popularly known as fruit flies is one of the common organisms used in…
Q: Explain mRNA and protein products of maternal effect genes within the early embryo?
A: Embryonic development refers to the development and formation of the embryo. It is characterized…
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 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: What are the relative merits of Drosophila, C. elegans, M. musculus, and Arabidopsis as model…
A: Model organisms are employed in research experiments to study a specific phenomenon where the…
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: What are the characteristics of the cleavage embryo?
A: Answer : Cleavage is the mitotic division in which the daughter cells are formed from the parent…
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: How do the processes of capacitation and acrosome reaction affect the fertilization process? How do…
A: Introduction Fertilization refers to the process when there is a fusion of male and female gametes…
Q: What is indirect development?
A: Development involves the functional and physiological maturation of an individual. It is a…
Q: In general what is thecause of the aneuploidies?
A: Aneuploid cells have an irregular chromosome count. Because each chromosome comprises hundreds of…
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: 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: 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: 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: Does the distribution of Ca21 in an egg correlatewith formation of the fertilization envelope?
A: Calcium plays a very significant role in several life processes that takes place within the body of…
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…
How do fruit fly maternal effect genes determine the
polarity of the egg and the embryo?
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- With regard to development, what are the roles of the maternaleffect genes versus the zygotic genes? Which types of genes are needed earlier in the development process?At which stage of development does XCI initially occur?Does the distribution of Ca21 in an egg correlatewith formation of the fertilization envelope?
- 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?Differentiate the primitive streak of the 24-hour from the primitive streak of the 18-hour chick embryo.How does distribution of the gray crescent affectthe developmental potential of the first two daughter cells?