Compared to a differentiated cell in the body, embryonic cells at the blastocyst stage have: O Less tightly packed chromatin and fewer repressed genes. More tightly packed chromatin and more repressed genes. O The same epigenetic status. An unknown epigenetic status (not yet discovered).

Q: Hi, can you elaborate about the following: certain characterize mutations in p63 and compare that to…

A: Transcription factors are proteins that help with the conversion of DNA to RNA. They're the proteins…

Q: Lateral inhibition and induction are key processes in embryonic development. Discuss two different…

A: Lateral Inhibition is the process in which a particular neuron is being stimulated and it's…

Q: Nanos is a strict maternal-effect gene in Drosophila; that is not transcribed in the embryo.…

A: The phenotypes of embryos with mutations in nanos can vary greatly, so it is important to predict…

Q: Select the correct statement - - neural crest cells can differentiate into melanocytes, peripheral…

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Q: Estrogen works by binding to the ER. It includes two types ER alpha and ER beta and the two…

A: Estrogen receptors(ES) are the protein molecules present inside the cell. Their activation takes…

Q: This is one given problem on my homework assignment for developmental biology. Thank you for the…

A: Retinoic acid (RA) One of the first chemicals discovered in the modern period of experimental…

Q: Deletion of a cellular proto-oncogene is likely to be associated with cancer.

A: True

Q: The CTCF protein is involved in the regulation of the Igf2-H19 gene cluster. Which of the following…

A: The gene expression involves transcription and later translation. Different mechanisms are involved…

Q: How does the p53 tumor-suppressor protein control cell-cyclecheckpoints?

A: Cell cycle checkpoint controls play a major role in preventing the development of cancer . a cell…

Q: Occasionally, a mouse X chromosome is broken into two pieces and each piece becomes attached to a…

A: Introduction One Of Two Sex Chromosomes Is The X Chromosome. The X And Y Chromosomes Are Found In…

Q: // Which of the following can become oncogenes by over-expression of the normal protein? src O Cip…

A: Introduction :- Oncogene is a  gene that is a mutant (changed) version of a normal cell growth gene.…

Q: Benign and cancerous tumors occur when the cell cycle control mechanisms no longer operate…

A: CANCER CELL When a normal cell mutated and grow out of control and multiplication is known as a…

Q: Polarity of oocyte of Drosophila What is the difference between the anterior and posterior…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: You are interested in the expression of regions of the X chromosome at different times in human…

A: The investigation of the X chromosome at different phases of human fetal development is a complex…

Q: Translocation of a proto-oncogene to a chromosome region with reduced methylation increases its…

A: Abnormal sequences of DNA methylation, disturbed patterns of histone posttranslational modifications…

Q: Why does X inactivation occur in female mammals?

A: A Chromosome is an entire chain of Deoxyribonucleic acid (DNA) with stabilizing proteins. The DNA is…

Q: Activation of p53 during cellular stress will generally Select one: o a. Increase transcription of…

A: P553 is a tumor suppressor gene.

Q: Why does X inactivation occur in female mammals?

A: Causes of X inactivation: X-chromosome inactivation usually define through the term that they are…

Q: Which of the following is NOT a regulator of the ep O CpG island hypomethylation RNA pol complex…

A: The epigenome is made up of chemical compounds and proteins which can attack to the DNA and take…

Q: Cleavage divides the eggs of vertebrates and many other animals into a cluster of separate cells. By…

A: An embryo in development is an excellent example of intricate biological self-organization and…

Q: If gene transcription is inhibited after fertilization, development past the two-cell stage does not…

A: The difference lies in the distinct developmental processes: gene transcription inhibition halts…

Q: Define about Several types of cellular stress events bring about rapidincreases in the nuclear…

A: The p53 is also known as the guardian of the genome. It is a tumor suppressor gene. The function of…

Q: A mutated form of protein p5x is found in patients with squamous cell carcinoma. In vitro studies…

A: A gene that produces a protein that is essential for regulating cell division and death and is…

Q: Genomic imprinting, where gene expression is based on the sex of the transmitting parent,…

A: Question - Genomic imprinting , where genes expression is based on the sex of the transmitting…

Q: If a genetic female fetus is exposed to testosterone in utero, would that individual develop a…

A: Men have noticeably more testosterone on average than women, despite the fact that testosterone is…

Q: Below you will find the normal p53 gene found on chromosome 17 and a mutated version of the gene.…

A: To solve such questions, we should know the corresponding complementarity between the bases and that…

Q: Why would a chromosomal translocation that puts a proto-oncogene under the control of a widely…

A: Please follow step 2 for detailed explanation.

Q: Describe/list the steps of how p53 can cause the GI phase to stall.

A: The p53 growth suppressor macromolecule plays a key role in the regulation of the cell cycle and…

Q: In many breast cancers, ER (alpha) activation by estrogens is generally considered responsible for…

A: In breast cancers, the activation of estrogen receptor alpha (ERα) by estrogens is often associated…

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: Explain what epigenetics is?  Please explain the role of epigenetics in vernalization.

A: Growth and development are modulated by environmental signals in many organisms. These signals are…

Q: Which of the following is not true? ○ In a somatic cell, imprinted genes are not expressed because…

A: Here's the analysis of each statement:In a somatic cell, imprinted genes are not expressed because…

Q: The expression of this inhibitor of G2 to M Phase of the cell cycle progression will be…

A: muscle cells regulate their cell cycle in response to decreased insulin stimulation brought on by…

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: Which one of the following events is unlikely to beassociated with cancer?a. mutation of a cellular…

A: Cancer is basically the uncontrolled proliferation of abnormal or mutated cells in the body. It is…

Q: Cornelia de Lange syndrome (CdLS) is a rare humandisease caused by a dominant loss-of-function…

A: Hi there! Since you have posted multiple questions, we are answering only first two sub-parts.…

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: CdLS is usually caused by new mutation in oneparent’s gamete. Why?

A: The changes in the sequence of nucleotides are called mutations. The agents that cause mutations are…

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: Which of the following proteins is a combinatorial transcriptional regulator in Drosophila that…

A: There are few important points : Combinatorial transcriptional regulator : It is a particular…

Q: Down’s syndrome in humans (trisomy 21), with 47 chromosomes in each diploid somatic cell, is…

A: Down's syndrome in humans also known as Trisomy 21 has 47 chromosomes in every diploid somatic cell…

Q: Occasionally, a mouse X chromosome is broken into two pieces and each piece becomes attached to a…

A: The X chromosome is one of the two sex chromosomes in mammals, along with the Y chromosome. The X…

Q: What role does the synaptonemal complex play? How is this complex different from cohesins?

A: Mitosis and meiosis are the two different ways that cells divide. When people talk about "cell…