Q: Name the process of development of egg into young one without fertilization?
A: The above-mentioned definition is true for parthenogenesis. It is a type of asexual reproduction…
Q: a. How many spermatozoa does one secondary spermatocyte produce? b. Where in zygote does the first…
A: The male gamete "sperm" fuses with the female gamete "Ovum" and after this fusion "Zygote" develops.…
Q: Which is theextraembryonic membranewhose function is to storenitrogen wastes of theembryo? Is this…
A: The membrane that is known to assist the developing embryo is known as an extraembryonic membrane.…
Q: Define about Spermatogenesis and oogenesis in mammals. ?
A: As we know all living organisms are made of basic unit of structure and function called as cell.…
Q: 18. 19. 20. 21.
A: The Plant Kingdom is a diverse group, including organisms ranging from simple aquatic algae to…
Q: astrulation, are there any evidences of cephalization? Why or why not?
A: Gastrulation: During gastrulation, cell motions cause the embryo to reorganise massively,…
Q: Name two structures derived from each of the three embryonic tissue layers: endoderm, ectoderm, and…
A: Two structures derived from each of three embryonic tissue layers are : Endoderm gives rise to…
Q: Parthenogenesis isa. the process by which the germ layers form.b. involved in the formation of the…
A: Reproduction is the process by which living beings produce their own kind.
Q: oogenesis.
A: oogenesis -In the human female reproductive system, growth process in which the primary…
Q: The inner cell mass of a human blastocysta. gives rise to the chorion.b. gives rise to the…
A: Cell is the basic unit of life. Based on the number of cells an organism may be prokaryotic or…
Q: Oogenesis produces_viable cell/s, and spermatogenesis produces_ viable cell/s О 4,2 О 1,4 O 4,4 O…
A: Spermatogenesis and oogenesis are the processes of formation of male and female gametes.…
Q: Which of the following has three germ layers? (a) morula (b) gastrula (c) blastula (d) blastocyst…
A: Answer is b.) gastrula.
Q: Name the third tier of embryonal cells in pinus formed.
A: All plants come under the kingdom Plantae. They are eukaryotes, multicellular, and having cell…
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: Distinguish between modes of mesoderm formation
A:
Q: In humans, implantation in the uterus occurs at whichstage of embryonic development?a. zygoteb.…
A: An embryo is an unborn offspring in the steps of development. It is part of the life cycle. It is…
Q: A gastrulation does NOT Select one: A. Consist of endoderm, mesoderm, and ectoderm B. Result in the…
A: In developmental biology, gastrulation is a stage early in the embryonic development of many…
Q: Birds, reptiles and insects have something in common as far as the development of their embryos.…
A: Answer :- Birds, insects and reptiles are higher vertebrate . All of these are developed from…
Q: In a reptile egg, the extraembryonic membrane thatencloses the embryo in a watery environment is…
A: Answer is b.) amnion.
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: 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 the three embryonic tissue layers of vertebrate embryos,and describe the process by which they…
A: Gastrulation is the cycle where differentiated cells from the zygote move to their particular areas.…
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: After the zygote undergoes several mitotic divisions, the resulting structure that implants in the…
A: Fertilization is the process in which gametes fuse to form a zygote. The zygote undergoes several…
Q: Explain how the flat embryonic disc takes on the cylindrical shape of a tadpole.
A: The embryo is the first phase of the development of the offspring. The life cycle starts shortly the…
Q: Contrast the number of sperm that are produced from oneprimary spermatocyte and the number of eggs…
A: Introduction The life starts from single cell called Zygote. A zygote is formed by the fusion of…
Q: Define chordamesoderm
A: Chordamesoderm is also known as axial mesoderm.
Q: Where in the human assigned female reproductive tract does fertilization of the egg take place?
A: Fertilization is the process in which a sperm and egg are fused together in the uterine tube of the…
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: differentiate the frog and mammalian spermatogenesis. Spermatogenesis Frog Mammal
A: Spermatogenesis is the development of haploid sperm cells from germ cells in the testis'…
Q: How many eggs do you think were released by the ovary of a female dogwhich gave birth to 6 puppies?
A: Reproductive system of female dog comprises of vulva, vagina, cervix, uterus (Y shaped), oviducts…
Q: After fertilisation, the resulting cell which gives rise to a new individual is the: (a) embryo (b)…
A: Fertilization is a process that occurs during reproduction in organisms. Reproduction is a process…
Q: Name the process of embryo connecting with uterine wall of mother.
A: Embryonic development is the development of embryo from fertilised egg and its subsequent…
Q: During the evolution of animals , bilateral summetry accompanied cephalization . suggest a reason…
A: Evolution is the process by which an organism inherits or adapts favourable characteristics that…
Q: Part IlI: Discussion 1. How can you distinguish an unfertilized egg from a fertilized egg? 2. As…
A: Fertilization is a natural phenomenon of producing mature male(sperm) and female(egg) gamete in…
Q: What happens to the second sperm nucleus, the one that does not fertilize the egg cell? What is the…
A: Sexual reproduction is a fusion of male and female gametes to produce offspring from the zygote.…
Q: gametogenesis, a primary spermatocyte generates sperm, a primary oocyte generates eggls). 14 41 D4,4…
A: Introduction:- Gametogenesis:- Gametogenesis is the process of division of diploid cells to…
Q: Provide and label an image of an egg that is in its early cleavage, distinguish this stage from…
A: Embryonic development: a. It is the development that occurs when the embryo is formed and develops…
Q: 3: Embryonic development from zygote through gastrulation
A: The early stages of embryonic development begin with fertilization.
Q: Division of human egg is a) Holoblastic and equal b) Holoblastic and unequal c) Isoblastic d)…
A: Introduction - One of the largest cells in the human body is the human egg, or ovum. It is, however,…
Q: What is fertilized egg known as?
A: Fertilization When male gamete fuses with female gamete, this process is known as fertilization.
Q: Explain how the embryo forms from the zygote
A:
Q: What is ripened ovary known as?
A: Plants are mainly multicellular organism, predominantly photosynthetic eukaryotes of the kingdom…
Q: What is the difference between the testes of shark and frog?
A: Testes are the male reproductive organ that is responsible for producing spermatozoa or male…
Q: Name the fully developed part of ovary containing egg.
A: The fully developed part of the ovary containing egg is called Graafian follicle and the associated…
Q: Compare the processes of oogenesis andspermatogenesis in humans
A: A cell that contains half the number of chromosomes of a somatic cell and able to unite with one…
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…
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- Label the parts of the ovule in the free-nuclear- and mature stage. Indicate the ploidy of the labeled parts (2n or n).A: Why do sea urchins have external fertilization? [Discuss the life style of the developing sea urchin embryo in the water column compared to a very different ecological niche of the adults on the ocean floor. Besides, would you want to give live birth to a sea urchin! ouch!] 2: Then why don't the parents take care of the young? [In fact the adults do in a way. After the embryo has grown large enough and metamorphosed into a young urchin they hide in the spines of the adults, living off of the scraps of food produced from the messy eating of the adults] 3: Because the urchin life involves two or more ecological niches, they are more susceptible to predation and exposure to environmental toxins. What environmental conditions, predators and toxins might they be exposed to at each stage?Spermatogoniaa. are haploid germ cells.b. are mature haploid cells.c. are male gametes. d. have flagella. e. are diploid germ cells.
- In a possible future scenario, male fertility drops to zero, but, luckily, scientists develop a way for women to pro-duce babies by virgin birth. Meiocytes are converted di-rectly (without undergoing meiosis) into zygotes, which implant in the usual way. What would be the short- andlong-term effects in such a society?. In a certain strain of turkeys, unfertilized eggs sometimes develop parthenogenetically to produce diploidoffspring. (Females have ZW and males have ZZ sexchromosomes. Assume that WW cells are inviable.)What distribution of sexes would you expect to seeamong the parthenogenetic offspring according toeach of the following models for how parthenogenesisoccurs?a. The eggs develop from oogonial cells that neverundergo meiosis.b. The eggs go all the way through meiosis and thenduplicate their chromosomes to become diploid.c. The eggs go through meiosis I, and the chromatidsseparate to create diploidy.d. The egg goes all the way through meiosis and thenfuses at random with one of its three polar bodies(this scenario assumes the first polar body goesthrough meiosis II).A female Komodo dragon (Varanus komodoensis) kept inisolation in a zoo had progeny. Each of the offspring had twoidentical copies of every gene in its genome. However, theoffspring were not identical to one another. Based on yourunderstanding of parthenogenesis and meiosis, propose ahypothesis to explain these observations.
- The Cavendish banana, the world’s most popular fruit, is currently threatened by extinction due to a fungus. This bananavariety is “triploid” (3n, with three sets of chromosomes) andcan only reproduce through cloning by cultivators. Givenwhat you know about meiosis, explain how the banana’s triploid number accounts for its inability to form normal gametes.Considering genetic diversity, discuss how the absence ofsexual reproduction might make this domesticated speciesvulnerable to infectious agents.. Two black guinea pigs were mated and over several yearsproduced 29 black and 9 white offspring. Explain theseresults, giving the genotypes of parents and progeny3. List three ways in which oogenesis differs from spermatogenesis. Be specific!OOGENESIS SPERMATOGENESIS1. 2. 3. 4. If a chimpanzee has a haploid (N) chromosome number of 24, how many chromosomes will be found in its zygote? (Highlight/underline one)6 12 24 36 48 72 96
- Fill in the blanks:(a) Humans reproduce _____________ (asexually/sexually)(b) Humans are _____________ (oviparous, viviparous, ovoviviparous)(c) Fertilisation is _____________ in humans (external/internal)(d) Male and female gametes are _____________ (diploid/haploid)(e) Zygote is _____________ (diploid/haploid).In humans:a. How many sperm develop from 100 primaryspermatocytes?b. How many sperm develop from 100 secondaryspermatocytes?c. How many sperm develop from 100 spermatids?d. How many ova develop from 100 primary oocytes?e. How many ova develop from 100 secondaryoocytes?f. How many ova develop from 100 polar bodies?What similarities do the illustrations have? What are the differences? What trends do you see from stage 1 to stage 3?