Q: What are morphogens, exactly? Explain how they affect the patterning of tissue throughout embryonic…
A: Pattern formation is a development process by which the cells acquired different identities…
Q: hich of the following rows identifies the structure responsible for maintaining the endometrium…
A:
Q: Three images of a TS19 embryo are shown a mid- sagittal section on the left and two external views…
A: In this particular images we have to describe how central nervous system formed and what is the role…
Q: What is the molecular explanation for maternal effect?a. The father’s gene is silenced at…
A: The maternal-effect is the influence on the phenotypic expression in an embryo or progeny due to the…
Q: The first week of human development is characterized by formation of the: A. inner cell mass B.…
A: The correct option is E - all of the above
Q: umbilical cord is formed from the chori
A: Within the uterus, the cells start to divide and form a ball of cells known as the blastocyst. It…
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: The development of sex and gender is a good example of a developmental cascade because: Group of…
A: Developmental Cascade: Developmental cascades refer to collective influences on the development of…
Q: Which of the following is required for successful fetal development after the egg has been…
A: When sperm successfully enters and fuses with the ovum fertilization occurs. This genetic material…
Q: Explain why breastfeeding can have lifelong, favorable consequences for the development of infants…
A: *Basically in the poverty stricken areas they are unable to consume the required diet as lack of…
Q: The formation of three germ layers is called Select one: a. gastrulation b. pluripotency c.…
A: A zygote is the fertilized egg that is formed by the fusion of the egg and the sperm via the process…
Q: What ethical issues are associated with the storage of embryos? Who should be making the decision…
A: After fertilization of egg with the sperm, Zygote is formed. It will develop to form Embryo, which…
Q: There are 5 primary oocytes that will undergo cell division, How many polar bodies will be formed…
A: Polar body are small cell produced from the primary oocytes during meiosis. Theses polar body do not…
Q: Briefly discuss avian early embryonic development, starting with fertilization and oviposition,…
A: Introduction The life starts from single cell called Zygote. A zygote is formed by the fusion of…
Q: proteins and RNA specified by maternal genes accumulate in the _____ of the oocyte and influence…
A: Maternal effects often occur because the mother supplies a particular mRNA or protein to the oocyte.
Q: Identify one disease, one drug, and an environmental hazard that is known to negatively impact…
A: Prenatal development is a term referred to as the process in which the embryo develops and organ…
Q: A human is a complex organism that develops from a zygote. Briefly explain some of the the steps in…
A: Reproduction is the process by which organisms multiply through sexual and asexual modes. It is one…
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: The individual cells are called blastomeres. Are all of the blastomeres the same size in these early…
A: After fertilisation of sperm & ovum, zygote s produced. This zygote then undergo various…
Q: give the Significance of the ff Cleavage to embryogenesis CAMs and Junctional…
A: * cleavage means division of cells in embryo . * The cells formes as result of cleavage are…
Q: O Occurs in protostomes and involves mesodermal tissue that is located in the space between the…
A: Ans- Occurs in protostomes and involves mesodermal tissue that is located in the space between the…
Q: The stage of prenatal development in which there is rapid growth and all of the organ systems are…
A: Developmental biology is the branch of biology in which the development of the organisms from the…
Q: Which of the following correctly identifies the different phases of human development? Select one:…
A: Human development It is the process of development of the human body , which begins with the…
Q: You are the product of all the genetic information contained in the fertilized egg cell at the…
A: Sexual reproduction- In this fusion of male and female gamete occurs. In this fusion of two gametes…
Q: what causes activation of certain genes before fertilization?
A: Fertilization is the process of fusion of male and female gametes for the formation of a zygotes.
Q: Which of the following illustrates the regulative nature of early mouse development? (a) the mouse…
A: The mouse has been used as a model organism to study the development of mammals.
Q: Define or describe each of the following processes (you may need to reset “Is it Cloning or Not”…
A: One of the basic characteristics of the living organism is reproduction. Reproduction is essential…
Q: The hormones in combined estrogen-progestin birth control pills prevent pregnancy primarily by…
A: For fertilization menstrual cycle is very important because it helps in the release of ova or egg…
Q: Which of the following statements regarding prenatal development risks is FALSE? a. Cigarette…
A: Prenatal means before birth, prenatal development refers to the development that occurs before birth…
Q: What is one of the ethical issues related to using embryonic stem cells? O A. Embryonic cells are…
A: Embryonic stem cells (ESCs) are collected from early-stage embryos i.e a group of cells that produce…
Q: Contrast determination and differentiation in development
A: The main difference between cell determination and cell differentiation is that the cell…
Q: Describe the structure and functions of the four extraembryonic membranes? Compare and contrast the…
A: Hello, the question you have posted is quite lengthy. I am answering the first two parts of the…
Q: Describe how teratogenic agents cause the deformity of the embryo and give specific example. 2.…
A:
Q: At which stage in development would a cell's gene expression not be altered between cell types? a)…
A: Introduction :- Developmental biology allows us to study and observe the changes that takes place…
Q: 42, The following is correct regarding embryonic development a, the egg is only viable for 3-4 days…
A: 42. The following is correct regarding embryonic development b. the egg is only viable for 12 to 24…
Q: What do the inner and outer surfaces of the placenta consist of? a) amniotic tissue and corpus…
A: Placenta is a organ that connects the mother's uterus with baby's Umbilical cord.
Q: What are the types of eggs based on their yolk content? What patterns of cleavage will they undergo…
A: As per bartleby guideline we are suppose to answer only 1 question. Please post the other question…
Q: Research on in vitro fertilization, discuss or identify the importance of in vitro fertilization
A: Fertilization refers to the process of fusion of women's egg and men's sperm to form a zygote. It…
Q: Which of the following describes the importance of the formation of the morula in early human…
A: The fertilization leads to development of the first diploid cell which is called a zygote. By day…
Q: State the relative advantages and disadvantages of amniocentesis, chorionic villus sampling, and…
A: Introduction Prenatal Diagnosis is referred to the process that deals with the genetic testing of…
Q: If there are 400M ovum/egg cells in a 1point woman's body, how many primary oocytes are there during…
A: An oocyte is essentially an immature egg. Oocytes becomes mature within follicle. These follicles…
Q: The trophoblasts of blastocyst will become the ____________. Question 12 options: a)…
A: After fertilization, the zygote and its related membranes, known together as the conceptus, tend to…
Q: Which of the following statements regarding the formation of human twins is INCORRECT? a. Nearly…
A: Twins can either be monozygotic or dizygotic and hence identical or not. They may share identical…
Q: A primary oocyte divides to give rise to a secondary oocyte and a first polar body. The secondary…
A: Humans reproduce by sexual reproduction by formation of gametes through meiosis. Male and female…
Amniocentesis and genetic screening reveal that a fetus carries a defective L1-CAM gene. What defects do you expect, and why?
Step by step
Solved in 2 steps
- Which three factors are crucial in the diagnosis of genetic defects in the fetal stage? What do you think weighs the most?What is an ethical use of prenatal screening and pre-implantation screening (since sometimes, fetuses found with down-syndrome are discarded; there are also cultures where, male offspring is preferred so embryos screened and found to be females are discarded?Chorionic villus sampling (CVS) is used to test for genetic disorders in the fetus and can be performed early in gestation (8-10 wks). The recommended method of CVS is to sert a probe with a needle on the end through the cervix and remove a small sample of e chorionic villi to be analyzed. Which description is a correct description of chorionic villi? Select one: They are found in the digestive tract of the fetus. They are developed from the endometrium. They contain cells whose nuclei differ genetically from cells of the fetus. They form part of the placenta.
- Carefully distinguish between the terms differentiation and determination. Which phenomenon occurs initially during development?Question:- A) Give one domain.motif found in the SRY portion and state clearly how it leads to the development of the Wollfian system. B) Explain the genotype and the phenotype of an XY female and how such an individual could occur. C) Explain the genotype and the phenotype of an XX male and how such an individual could occur.State the relative advantages and disadvantages of amniocentesis, chorionic villus sampling, and preimplantation genetic diagnosis in the prenatal diagnosis of human genetic abnormalities.
- At which stage of development does XCI initially occur?--------------- A. Answer the following questions briefly (3-5 sentences only).1. How are the three axes for symmetry in the animal bodies established?2. Explain how the different germ layers give rise to different tissue types.3. Explain the role of axis formation in development B. write down the autapomorphic traits for the c3, c4, CAM plants and include their distinct environments Link: https://www.nature.com/scitable/knowledge/library/the-ecology-of-photosynthetic-pathways-15785165/What is the significancw of cleavage in early development? Discuss.
- Describe the difference between Amniocentesis and Chorionic villus sampling. Can both be done at the same time during pregnancy? Which is less invasive?how can I Identify the source (mechanism) and types of increased mutations in older mother oocytes and older father sperm.Zygote Embryo Muscle cells Intestinal cells Liver cells Blood cells Nerve cell Cardiac cells (1) Specialization occurs, resulting in the formation of a great variety of cell types. (2) Genes are inserted into the zygote to allow for the formation of different cell types. (3) The expression of genes responsible for the different cell types is controlled by the placenta. (4) The genetic information in the zygote is divided to produce a complete set for each cell type