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: Which is a triploid tissue? How is the condition achieved in a fertilized ovule?
A: Anther produces pollen grains which lands on the stigma of the pistil with the help of biotic and…
Q: What is the ovum doing during the primary oocyte stage?
A:
Q: Which structures develop from the neural tube and somites?
A: the structures that develop from the neural tube and somites are :
Q: What are limb buds?
A: Vertebrates have three basic germ lines in the developing embryo. The outermost ectoderm, the middle…
Q: How many days after ovulation does implantation occur, and inwhat stage is the conceptus at that…
A: Implantation is the stage when the embryo adheres to the uterine wall after fertilization. Ovulation…
Q: What is the difference between internal & external fertilization?
A: The process in which a male gamete commonly known as sperm that is released by the male reproductive…
Q: How is a zygote formed?
A: Sexual reproduction: It is a type of reproduction that involves the fusion of gametes. It required…
Q: What is the thick connective tissue layer that surrounds the parenchyma of the ovary called?
A: Ovary is the female reproductive organ.It has distinctively two regions: cortex which contains…
Q: What is the histological difference between a morula and a blastocyst?
A: Introduction Life starts from single cell called Zygote. Zygote is the single diploid cell resulted…
Q: What is the functional significance of the stratum basalis of the endometrium?
A: Endometrium: It is the inner lining part of the uterus which has two layers. Stratum basalis and…
Q: What is the entire process of oogenisis?
A: Oogenesis is the formation of a mature female gamete called ovum in the ovary. It is one of the…
Q: What is yolk? What is its role in fertilization and development?
A: The development of organisms depends on the supply of resources. In embryo development nutrition of…
Q: What is normal gestation period(in days) of the developing foetus?
A: The developing zygote is called an embryo from the conception to the eighth week of the pregnancy.…
Q: What is the zygote stage?
A: The process of embryogenesis and fetal development initiate after the event of fertilization. It is…
Q: What aids in the differentiation or the maturation of the oogonium into a mature ovum?
A: Oogenesis is the process of formation of ovum. It occurs in ovary of female.
Q: What is cephalization? How does lateral symmetry favor cephalization?
A: Symmetry is the balanced distribution of duplicate body parts or shapes within the body of an…
Q: Where is zygote formed?
A: Zygote is a diploid cell formed by fusion of male and female gametes. It then undergoes mitotic…
Q: What is the vernix caseosa of the fetus? What purpose does it serve?
A: The unborn offspring developing from the zygote in an animal or human is called a fetus. The fetal…
Q: How is polyspermy prevented?
A: Polyspermy is the process by which multiple sperms fertilize a single egg. This happens in only 1%…
Q: Why does external fertilization not require the involvement of gametes?
A: The fertilization is the characteristics of sexual reproduction that involves fusion of male and…
Q: What is ovum?
A: The fusion of the sperm and the egg is what brings about the formation of the zygote, which will…
Q: How does the oocyte nucleus move during oogenesis?
A: Oogenesis: Otherwise called as ovogenesis. This is a process that happens during the embryonic…
Q: How does oogenesis produce egg cells?
A: Oogenesis is a type of gametogenesis that results in the production of female gametes, also called…
Q: Why is epididymitis rare in prepubescent males?
A: The reproductive system (genital system) is one of the major organ systems in the body that includes…
Q: What factors could influence the length and timing of awoman’s monthly uterine cycle?
A: Ovulation stands for the phenomenon through which a mature egg is given out by the ovary in a…
Q: How does senescence occur?
A: In biology, senescence could be a method by that a cell ages and Completely stops dividing however…
Q: What are somites?
A: Somites A somite is a division of the body of an animals or embryo. Somites are bilaterally paired…
Q: Why do you think the zygote is dormant for sometime in a fertilised ovule?
A: In angiosperm, pollination is the process in which pollens are transferred from the stamen to the…
Q: "What is the advantage of internal fertilization over external fertilization and vice versa"?
A: The natural cycle by which new individual creatures – "offspring" – are delivered from their…
Q: What happens to the corpus luteum if fertilization does not take place?
A: Corpus luteum is a mass of cells formed in the ovary. It is responsible for the production of the…
Q: .What type of abnormality in the sperm that fertilizes a normal egg will produce an XYY zygote? What…
A: XYY syndrome or Jacob's syndrome . This condition 47 ( or 46Y) is seen in male . It is not…
Q: How is the child affected if it has grown from the zygote formed by an XX-egg fertilized by…
A: Zygote is also known as a fertilized egg because it is formed by the process of fertilization in…
Q: What are the three germ layers formed during gastrulation?
A: Developmental Biology is the field of biology that studies the processes by which multicellular…
Q: How does the malegamete penetrate the eggcell? How does the femalegamete protect itself from…
A: The process of fertilization is characterized by the fusion of the male and female gamete for the…
Q: What happens if fertilization takes place in utreus?
A: Reproductive system (or genital system) is used for the sexual reproduction. The female attains…
Q: What is the process in which the germ tissue layers form?
A: Germ layers are the three primary cell layers, formed in the earliest stages of embryonic…
Q: What is the first appearance of embryonic callus?
A: Callus is defined as an unorganized tissue mass growing on solid substrate. Callus forms naturally…
Q: What is the advantage of internal fertilization over external fertilization and vice versa?
A: Question - What is the advantage of internal fertilization over external fertilization and vice…
Q: Why does corpus luteum stay active throughout pregnancy and in the absence of fertilization, is…
A: Introduction We will answer the question in below step.
Q: Prior to fertilization, where is the male gamete located?
A: Flowers are also known as blossom. Their primary function is reproduction in plants. They also a…
Q: What is the time period for which sperm and egg are viable?
A: The mixed glands that serve the function of gamete production in the male reproductive system and…
Q: What is the developmental fate of the inner cell mass of the blastocyst?
A: A diploid zygote is formed by the union of a haploid egg cell and a haploid sperm cell. The zygote…
Q: How strobili are differentiate between male and female?
A: A strobilus is a reproductive structure characterized by overlapping scale-like parts, as a pine…
Q: Can you explain oogenesis and the folllicular developments?
A: Oogenesis is the formation of the ovum in the female members of the mammals. It starts before birth,…
Q: During which of the 3 stages of oogenesis does the oocyte nucleus move?
A: Oogenesis- Oogenesis is the process of formation of female gametes. This process begins inside the…
Q: Where does fertilization usually occur?
A: Sexual reproduction is a type of reproduction, which involves a complex life cycle in which a…
Q: Why would the absence of a father affect the timing of puberty?
A: Puberty is defined as the stage when a child starts to grow sexually. During this stage, physical…
Q: It appeared, then, that something in the region of the gray crescent was essential for proper…
A: The amphibian eggs, when divided into two blastomeres along the plane of first division, the cells…
What is the first appearance of embryogenic callus?
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