enetration of the zona pellucida Cortical reaction 1st cleavage Acrosomal membranes rupture, and release their enzyme contents Penetration of the corona radiata Depolarization of egg membranes Migration of cortical cytoplasm to form gray crescent Sperm attach loosely on

Q: Internal genitalia like the vagina, uterus, and ovaries in females, and the testes, epididymis, and…

A: Disorder of sex development (DSD) is a phenomenon that occurs in several organisms in which slight…

Q: Which phase of development does blastopore form Cleaveage Organogenesis Blastulation/blastula…

A: Gastrulation  is the phase of development in which blastopore form Cleaveage. Blastopore is a…

Q: +Describe the process of implantation of the embryo, what cells are involved and their roles.…

A: Implantation is the process where the blastocyst attaches to the endometrium of the uterine cavity.…

Q: Describe the process of mammalian and avian gastrulation

A: The basic procedure in initial development that proceeds in the emergence of 3  primary germ layers…

Q: Briefl y defi ne what is involved in each of the six “I’s”.

A: Introduction: Microbes are micro-sized and even smaller microorganisms that are not visible through…

Q: Number in correct order (1–6) from the earliest to the latest stage of development. ________ corpus…

A: The female reproductive system is primarily responsible for the production of female gamete cells.…

Q: Why is a second polar body expelled after fertilisation?   a)   To remove excess cytoplasm   b)…

A: The second polar body is a small, non-functional cell that is produced during oogenesis after the…

Q: An oophorectomized monkey is treated with high doses of estrogen. Which of the following changes is…

A: The question is asking about the likely changes in the endometrium of a monkey that has been…

Q: What will guide them to make the right decision?  Do they have a choice?

A: Answer: 1.trophobalst or icm if cells choose to become they will end up in the placenta and if they…

Q: Give step involves loss of cytoplasm by the spermatids?

A: During the first meiotic division, spermatids result from the primary spermatocytes. It produces a…

Q: Explain the reason why in the absence of Delta, cells become unsynchronized and somites are not…

A: Introduction: Delta from the neighbouring cell attaches to the notch receptor during Delta-Notch…

Q: Compare and contrast the oogenesis and spermatogenesis in chicken and drosophila melanogaster

A: Spermatogenesis is the process of the formation of haploid stem cell known as spermatogonium. The…

Q: Outline the enzymes that play important role in fertilization. Include their functions.

A: Fertilization is the event in sexual reproduction that marks the fusion of the male gamete which in…

Q: Classify and diagram embryos on the basis of their: (a) yolk content, (b) cleavage types, (3)…

A: Cleavage in animals is depends upon amount of yolk. Yolk distribution can be complete ( holoblastic…

Q: The chorion is the_and the amnion is the . site where an embryo is implanted into the uterus; the…

A: The fetal membranes surrounding the embryo provide protection and nourishment to the developing…

Q: What events occur during the first week after fertilization?Use the terms zygote, morula,…

A: Embryogenesis is the development of a plant or animal embryo. Embryogenesis follows a sequence of…

Q: Briefly discuss the important events occurring during gastrulation and neurulation in avian…

A: Gastrulation is a process during embryo development where the zygote undergoes cleavage and forms a…

Q: A. Answer the following questions briefly (3-5 sentences only). 1. How are the three axes for…

A: Symmetry in biology refers to the balance and arrangement of body parts or features in an organism.…

Q: Give the function/purpose of the following terms: germ layers ectoderm mesoderm

A: Introduction :  After implantation of the embryo into the uterus, the embryo differentiates into…

Q: Give the function/purpose of the following terms: chorion chorionic villi trophoblast amniotic sac…

A: Introduction: Human beings reproduce sexually and are viviparous. The reproduction in human beings…

Q: describe briefly the phases of neurulation. Mention some signaling molecules, genes, morphogenetic…

A: Neurulation refers to the folding process in vertebrate embryos, which includes the transformation…

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: Gastrulation is brought about by an invagination of the wall of the blastocoel. True False

A: The objective of the question is to determine whether the statement 'Gastrulation is brought about…

Q: After fertilization a developing embryos goes through several changes. At about 2-3 days, what is…

A: During fertilization the haploid gametes, that is, sperm from a male and secondary oocyte from…

Q: 12. Refers to the embryo below. Name the structure (in purple) and pointed to by the red arrow. 2…

A: The period (nine months of pregnancy) of developing one or multiple offspring from fertilization up…

Q: 12. 11 14 13 10

A: Eggs of chicken are telolecithal and they divide through meroblastic cleavage. The development and…

Q: Early Embryonic Development Match the following terms to the descriptor. NOTE: If you want to change…

A:

Q: Please list the genetic processes that are crucial for gametogenesis and explain their importance.

A: Gametogenesis is significant because it is the mechanism by which your functional gametes (egg and…

Q: Draw a serial transverse section of 18 hour chick embryo.

A: 18 hour chick embryo. At this point, it is clear to see the core translucent area pellucida and the…

Q: Answer the following questions briefly (3-5 sentences only). 1. Why does oxygen consumption increase…

A: Introduction  Developmental biology is the scientific study of how organisms grow and develop from a…

Q: Epithelium-Mesenchyme transitions (MET or EMT) are crucial morphogenetic events occurring during…

A: During EMT transition  there is loss of cell polarity as well as adhesion property of epithelial…

Q: In the provided image (whole mount of 33-hour chick embryo), color the respective germ layers and…

A:

Q: differentiate the oogenesis and spermatogenesis of chicken and fruitfly.

A: Oogenesis is the process of egg cell production in female organisms, while spermatogenesis is the…

Q: 38, 39- 37 36- 40. 35- 41 42 34 33 43, 32 31 30 45 46 47 0 0 29 48 27 26 25 21 24 20 21 10 19 11 18…

A: A multicellular organism develops from a single cell called a fertilized egg. The fertilized egg…

Q: How many somites are there in mouse? In chicks? In humans

A: In embryology, a somite is among a series of longitudinal blocklike sections into which the…

Q: Match the rodent ovulatory cycle phase with the correct hormone combination Proestrus x Peak…

A: The term menstrual cycle is associated with the occurrence of cyclic ovarian activities in mammals.…

Q: Why is the fate of many cells determined during gastrulation? Are there many cytoplasmic…

A: Gastrulation is the process of embryonic development in which the blastula, an embryo with a single…

Q: With regard to early cleavage in the sea urchin, is the entire zygote involved in early cleavage?…

A: Understanding the development processes can help us understand how different organisms evolved and…

Q: Which statement does NOT accurately describe somites?   series of tissue blocks   form the ribs and…

A: Embryology is the study of development and growth of fertilized egg(zygote) into mature embryo. The…