A female egg cell has two outer membranes how does the egg cell prevent polyspermy? if polyspermy happens, will the fertilization be viable?

Q: Fusion of pronuclei occurs during ________.a. spermatogenesisb. ovulationc. fertilizationd.…

A: A pronucleus refers to the haploid nucleus of either the sperm or the egg, both present in the…

Q: After fertilization the blastocyst develops three germ layers. Which germ layer is the innermost…

A: In the human embryo , after about three days of fertilisation,the zygote forms a solid mass of cells…

Q: In a newly fertilized egg, the vitelline layer O secretes hormones that enhance steroidogenesis by…

A: In Sea urchin, a capacitated sperm first crosses zona pellucida layer then it passes through…

Q: Compare oogenesis to spermatogenesis. How are the two processes similar? How do they differ?

A: Spermatogenesis is the reproductive stage where haploid cells are formed from a diploid stem cell…

Q: What structural and biochemical changes does the spermatid undergo during permiogenesis? How do…

A: spermiogenesis is the final stage of spermatogenesis that involves maturation of spermatids into…

Q: Why do most zygotes develop after certain amount of embryo is formed?

A: The embryo is the early stage of the development of multicellular living beings. A fertilized egg…

Q: Fill in the blank:  _________________ on the inner lining of the uterine tube aid in moving a…

A: Embryo genesis is the formation of embryo and for this process to occur, ovary releases an…

Q: If an egg cell were treated with EDTA, a chemical that bindscalcium and magnesium ions,(A) the…

A: EDTA - Ethelene diamine tetra acetic acid is a chelating agent and is very effective chelator of…

Q: If it takes just one sperm to fertilize an egg,why do males make so many?

A: During fertilization, the head of sperm binds to the zona pellucida layer of egg and induce acrosome…

Q: Describe the events that follow contact of a spermatozoon with an egg and explain Polyspermy and the…

A: The term "embryogenic development" is sometimes used. This procedure involves the embryo's creation…

Q: How does oviposition occurs in female turtles. Provide the pathway involved in the oviposition…

A: Answer :- As we know that Males have a couple of penises that pass sperm from their cloaca to the…

Q: There are 5 primary oocytes that will undergo cell division, How many functional egg cells will be…

A: The journey in short of an oocyte is as follows- the egg follicle is activated, the egg grows and…

Q: What do mean by colostrum? Why it is benifical for a new born baby?

A: Glands are important organs located throughout the body. Exocrine and endocrine glands are the two…

Q: In a female human, the oogonium forms when the female is a _____________.

A: Singular word – oogonium, the plural word is oogonia. Oogonia is an immature female reproductive…

Q: Spermatogenesis produces cells that area. diploid and genetically identical to each other.b. diploid…

A: Spermatogenesis:            The mature male gametes commonly called sperm but more precisely known…

Q: Draw the chromosomes in the zygote (cell after fertilization) egg cell fertilization sperm cell

A: Sperm cell is the male gamete and egg cell is the female gamete. Gametes are haploid in nature. Male…

Q: What would happen if two sperm fertilized the same egg cell? If twosperm fertilized two egg cells?

A: Step 1 Fertilization and implantation is the process of fusion of two types of gametes (spermatozoa…

Q: Describe events that follow contact of a spermatozoon with an egg. What is polyspermy and how is it…

A: Fertilization happens when a sperm and an oocyte (egg) combine and their nuclei.

Q: Compared to separate sexes and assuming self-fertilizing is not possible, what might be one…

A: Hermaphrodite  The organism that possess both sex organ male and female together inside the body are…

Q: 44- need help with following. please be specifiy about answer

A: Zygote is proudced by the fusion of male gamete (sperm) and female gamete (egg).

Q: Name a mature ovule containing the embryo.

A: The plant embryo is a part of the bud that consists of the earliest forms of leaves, stems, and…

Q: During gametogenesis, from a single germ cell (oocyte/spermatocyte), males produce. O4;1 4:4 O1;1…

A: ANSWER) Gametogenesis is the process by which oocytes and spermatocytes produces gametes. More male…

Q: What is the differences between Mammals and Frogs in Spermatogenesis?

A: Gametogenesis is the process of manufacturing gametes or daughter cells in gamete-producing mother…

Q: Where does fertilization take place in human body.

A: Humans are the multicellular complex organism and reproduce by sexual mode. This mode of…

Q: Which of the following cells is haploid? (a) primary oocyte (b) secondary oocyte (c) oogonium (d)…

A: Answer - In meiotic division of cells, haploid daughter cells are produced. They have one pair of…

Q: How is an egg (oocyte) prepared during oogenesis for fertilization? Why is preparation essential to…

A: Oogenesis is defined as the process by which the female sex cells or ova or egg cells are produced.…

Q: Rarely, two sperm may penetrate a secondary oocyte. Do youthink this fertilized cell will survive…

A: Fusion of only one sperm takes place with the egg.

Q: what is the purpose of calcium ion in fertilization?

A: * Fertilisation is an generative fertilisation fusion of gametes gives rise to a new individual…

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: How does oviposition occurs in female frugs. Provide the pathway involved in the oviposition process

A: The female reproductive system consists of ovaries and oviducts. A pair of ovaries located near the…

Q: After ovulation, the secondary oocyte enters the oviduct. Passing by the fimbriae it enters the __

A: The secondary oocyte is released from the mature Graafian follicle of the ovary during ovulation…

Q: Implantation of a blastocyst does not always happen.  Approximately how many days after…

A: Fertilization of the secondary oocyte in the oviduct forms zygote which in turn divides by cleavage.…

Q: What means to retain the ability to become any cell type—including germ-line cells and gametes—when…

A: Stem cells are the cells that are capable to convert to different cell types. These are present in…

Q: Despite the presence of So many sperms in the vicinity of an egg cell, only one sperm enters the…

A: Fertilization is a process in which male and female gametes fuse to form a zygote. This zygote…

Q: 14. Female gonads that produce eggs and the female sex hormones. About 3 cm by 1cm in size 15.…

A: 14) Ovary : these are female primary sex organs and here oogenesis or process of formation of female…

Q: Describe all the steps involved in the formation of an embryo from the reproductive cells of men and…

A: Answer: The reproductive cell in males are : SPERMS  The reproductive cell in females are : EGG

Q: Birth control pills commonly provide excess progesterone that serves to inhibit (suppress) the…

A: The major hormones involved in the Menstrual Cycle are: FSH: This hormone is responsible for the…

Q: What causes an embryo to develop female external genitals?A. A high ratio of estradiol to…

A: Cause of an embryo develop external genitals depends on testosterone level and not on estradiol

Q: In comparing external and internal fertilization, what evolutionary change can be seen in the coats…

A: In sexual reproduction, the process of fusion of two gametes to form a zygote is known as…

Q: Explain how the embryo forms from the zygote

A:

Q: Fertilization primarily occurs in the oviduct yet implantation usually occurs in the uterus. Why?

A: Sexual reproduction refers to the form of reproduction that occurs through the union of male and…

Q: What is ripened ovary known as?

A: Plants are mainly multicellular organism, predominantly photosynthetic eukaryotes of the kingdom…

Q: What answer choice ?

A: Mitosis and meiosis are the two types of nuclear divisions in eukaryotic cells. Mitosis (also known…

Q: After the eighth week of development an embryos is referred to as what?

A: After the 8th week of development, the embryo is referred to as "fetus"

Q: Regarding female gametes, when does melosis begin? O at age 5 O at tertilization O during fetal…

A: Gametes are sex cell or reproductive cell that consists of a haploid set of chromosomes. Gametes are…

Q: Gastrulation occurs to form which three tissues? O hypoblast O ectoderm mesoderm O endoderm O B, C,…

A: During the early stages of embryo development, a multitude of signals are being released, some of…

Q: why is polyspermy lethal in an egg cell?

A: Polyspermy is defined as the introduction of two or more sperm cells into the cytoplasm of an egg.