Amniocentesis and genetic screening reveal that a fetus carries a defective L1-CAM gene. What defects do you expect, and why?

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…

Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.