What is the source of different cytoplasmic determinants present in the embryo after fertilization? They are introduced into the cell when the zygote divides They were produced during the process of fertilization. They are within the cytoplasm of the egg cell. They are from the sperm cell.
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What is the source of different cytoplasmic determinants present in the embryo after fertilization?
They are introduced into the cell when the zygote divides
They were produced during the process of fertilization.
They are within the cytoplasm of the egg cell.
They are from the sperm cell.
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- There are 6 major events in fertilization. Discuss the process of fertilization or conception, with emphasis on the sperm-egg interaction. Proteins on the sperm plasma membrane bind to ZP3 molecules within the zona pellucida of the egg. Why is this event important? Zona binding triggers the acrosome reaction, in which the sperm plasma membrane fuses with the outer acrosomal membrane, causing exocytosis of acrosomal contents. What is in the "acrosomal content"? Acrosomal enzymes begin to dissolve a hole in the zona pellucida. This enzymatic degradation, accompanied by rapid sperm tail beating, moves the sperm through the zona. Where does the sperm intend to reach?Order the events leading to the sperm's nucleus fusing with the egg's nucleus. Question 1 options: sperm's nucleus is released into the egg's cytoplasm sperm burrows through the orona radiata sperm's nucleus and egg's nucleus fuse sperm's cell memrbane fuses with egg's cell membrane sperm's acrosome enzymes burrows through the zona pellucida the zona pellucida changes so that any new sperm's acrosome cannot burrow through the zona pellucidaSelect ALL of the following that occur during spermiogenesis: Microtubules form a flagellum The nucleus condenses O Proteolytic (digestive) enzymes are bundled in an acrosomal cap Excess cytoplasm is shed
- Cell differentiation occurs through _______________, whereas morphogenesis involves _______________. (a) pattern formation; cell determination (b) cell division; cell expansion (c) cell expansion; pattern formation (d) cell determination; cell division (e) cell determination; pattern formationWhy is the fate of many cells determined during gastrulation? Are there many cytoplasmic determinants during this stage?Which of the following is NOT true while comparing internal to external fertilization. In external fertilization, zygotic DNA replication starts after the fusion of gamete pronuclei; in internal fertilization, the first zygotic DNA synthesis happens before pronuclei fusion. B Capacitation is only observed in internal fertilization. In both internal and external fertilization, the cortical granule reaction is required for the slow block to polyspermy. In external fertilization, intracellular calcium release is stimulated prior to gametes fusion; in internal fertilization, it happens after gametes fusion. In both internal and external fertilization, there is a slow and a fast block to polyspermy.
- Why is the cytoplasm of sperm cells very reduced? Why do mitochondria of sperm cells concentrate in the base of the flagellum?During spermatogenesis, which of the following options describes when cytokinesis would occur? Following anaphase I Following metaphase II Following telophase I Following telophase IIwhy is polyspermy lethal in an egg cell?
- There are 6 major events in fertilization. Discuss the process of fertilization or conception, with emphasis on the sperm-egg interaction. Egg-binding proteins on the sperm cell surface bind to molecules on the egg cell membrane. What happens to the chromosomes of the sperm and egg? The sperm cell membrane fuses with the egg plasma membrane, allowing the sperm nucleus and centriole to enter the egg cytoplasm. What is the purpose/role of the centriole during fertilization? The final event would be when the egg and sperm pronuclei migrate toward each other in preparation for syngamy. What is the purpose of reproduction?Roberto and Maria are getting married. They want to know the main events of reproduction in order? O meiosis, fertilization, cleavage, gastrulation, neurulation, organogenesis, growth O gamete formation, organogenesis, neurulation, gastrulation, growth O mitosis, fertilization, cleavage, gastrulation, neurulation, organogenesis, growth O zygote formation, gastrulation, growth, organogenesis, neurulation, cleavage gamete formation, cleavage, growth, organogenesis, neurulation, fertilization 2p Question 16 Esc F6 F7 F2 F3 F4 F5If cells choose to become trophoblast, they will end up in the placenta. If they choose to become ICM, they will give rise to the 3 germ layers that will make up the rest of the body of the embryo. Explain what rpocesses or mechanisms will guide them to make the right decision. Do they have a choice?