The individual cells are called blastomeres. Are all of the blastomeres the same size in these early cleavage embryos?

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: If there are 7 spermatogonium that will undergo cell division, how many functional spermatozoa will…

A: Spermatogenesis is the process of production of male gametes(sperms) inside the seminiferous tubules…

Q: What parts are persistent throughout the development of the embryo? Why are these present in all the…

A: Answer

Q: Explain the Human embryo at beginning of fifth week ?

A: The time between conception and birth of a baby is called the gestation period. A normal gestation…

Q: What is an ectopic pregnancy?

A: Ectopic pregnancies exist in around one out of every 50 conceptions, as per the statistics of the…

Q: How is the yolk sac formed?What is the function of theyolk sac?

A: Yolk sac is the membranous sac attached to the embryo. It is also known as umbilical vesicle.

Q: What would be the consequences if polyspermy was not prevented? How does the zygote (or morula or…

A: Polyspermy:- it is a condition in which single oocyte is usually penetrated by more than one sperm.…

Q: Outline the postfertilization events that lead to formation of a blastocyst.

A: Reproduction is the phenomenon of producing offspring from the parent. The reproduction can be…

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 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: 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 is the significance of cleavage during the early stages of development?

A: The cleavage is the division of cells in the early stage of an organism. This implies that with each…

Q: Explain why growth of the blastomeres cannot take place  during cleavage?

A: Development in biology occurs to ensure the formation of multicellular organisms from the single…

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: What Causes the End of Cleavage in a Frog Embryo?

A: All frogs reproduce sexually, but instead of the fertilization taking place inside the female, it…

Q: What are the properties of the multiple ovulution embryo sac?

A: MOET  approach involves the production of multiple ovulation embryo sac which contains flush of…

Q: What are the structural changes that occur in the uterus over the course of the menstrual cycle and…

A: The menstrual cycle is a sequence of natural modifications in hormone manufacturing and the systems…

Q: What happens during the stage of dilation, the stage of expul- sion, and the placental stage of true…

A: Labor Series of events that take place in the genital organ in an effort to expel the viable…

Q: What parts are persistent throughout the development of the embryo? Why are these present in all the…

A: The fitness of the organism depends on the early stages of embryonic development, which include…

Q: What is oogenesis? Give a brief account of oogenesis.

A: The female reproductive organs comprise primary sex organs (ovaries) as well as accessory sex…

Q: What are the distinguishable parts of the 72-hour chick embryo? Give at least 5 parts and the adult…

A: Probably the best magical occurrence of nature is the change of the egg into the chick. A chick…

Q: What is the purpose of the placenta? Which part of the blastocyst eventually becomes the fetal…

A: Introduction  An organ that grows in the uterus during pregnancy is the placenta. A developing…

Q: What are the different layers of a fertilized T. trichiura? Discuss their respective compositions…

A: Introduction:- Trichuris trichiura (also known as Trichocephalus trichiuris) affects the human…

Q: What are the three germ layers formed during gas-trulation, and what are the principal structures…

A: Introduction :- Gastrulation is a process in which an embryo converts from a one-dimensional layer…

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: Identify the labeled structures in the embryo shown:

A: Archenteron is a structure which is observed in a developing embryo in the Gastrulation stage. It is…

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 is this condition that results if the fertilized egg fails to descend down to the uterus?

A: Reproduction is the process by which an organism creates more of its own progeny. Reproduction is…

Q: If spermatogenesis is normal and all cells survive, how many sperm cells will be formed from 100…

A: Spermatogenesis is the process of sperm development. This cells play importance role in sexually…

Q: Which of the following is not true about neurulation? Choose all possible answers. a. Segregation…

A: The brain is a complex organ that controls the thought, memory, emotion, touch, motor skills,…

Q: Draw and label the following parts: (a) membrane coverings of gonads (b) supporting cells of gonad…

A: (a) The membranes covering the male gonads (testis) are: (1) Tunica vaginalis, (2) Tunica albuginea,…

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: What is the technical term for the fertilized egg?

A: The process of fusion of gametes from male and female parents is called fertilization. The sperm is…

Q: Which plane would be helpful when viewing the heart and the right kidney at the same time?  whychose…

A: INTRODUCTION Fertilization Fertilization is a process of union of the spermatozoa and oocyst and…

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

A: The process of formation of gametes is known as gametogenesis. In females, oogenesis is a process of…

Q: How does the embryo get nourishment inside the mother’s body?

A: Embryo means the developing offspring from the time of approximately 2nd to 8th weeks after the…

Q: Gastrulation is brought about by an invagination of the blastula. True or False?

A: It is true.

Q: Distinguish between: Meroblastic cleavage and Holoblastic cleavage. Explain with examples of each.

A: The major difference between meroblastic cleavage and holoblastic cleavage is that the meroblastic…

Q: What other developmental hallmarks are often associated with spiral or radial cleavage?

A: Based on the directions and angles the cleavage furrow cuts, cleavage is of four types, namely,…

Q: How do the processes of capacitation and acrosome reaction affect the fertilization process? How do…

A: Introduction  Fertilization refers to the process when there is a fusion of male and female gametes…

Q: In tabular form, Cite the differences of spermatogenesis on frog and chicken.

A: "Spermatogenesis" is the process by which mature male gametes are produced, which subsequently…

Q: what kind of division can perform normal growth and development for the embryo & why

A: The embryonic development process initiates after the fusion of male and female gametes. It involves…

Q: Are different stages of development tend to generate differences in stimulating cleavage and…

A: Cleavage -- Term cleavage is defined as a series of rapid mitotic division of zygote after…

Q: What organ does the somatic hypomere originating from the general mesoderm give rise to?    a.…

A: Somatic hypomere is found to give rise to skeleton of the body, limbs and bony girdles. The mesoderm…

Q: How many stages of cleavage are there in sea urchin

A: Sea urchins go through radial cleavage, like chordates, ascidians, and different echinoderms. Like…