PPT-embryonic development in the fruit fly

John Noto BIO441 Lecture 24 April 2017 Development Development refers to interaction of the genome with the cytoplasm and external environment to produce a programmed sequence of typically irreversible events. Objectives. Explain prenatal development from fertilization to birth. Understand different biological process’ in all phases of prenatal development. Define key vocabulary. Chart different phases in . An embryo is a . multicellular. . eukaryotic. organism in its early stages of development. In humans, an embryo is carried in the uterus.. I. n humans, the embryo is a developing organism until the first eight weeks, after which it is called a fetus until birth. . their functions. By. Dr. R. C. . Nath. ; Associate Professor. Department . of Zoology. Govt. Degree College, DMR. .. Fig: Chick’s egg with different regions. Definition of Extra Embryonic Membrane:. Voluntary regulation of the number of children produced and when they are conceived.. Coitus interrupts: withdrawal of the penis from the vagina before ejaculation.. Rhythm method: abstinence from sexual intercourse for several days before and after ovulation.. Survey of Embryonic Development. Lab 11. Hormonal controls of the menstrual (ovarian and uterine) cycles . Fertilization, implantation, and early development. Final lab practical this time next week. Saha. Department. of Zoology. University. of . Rajshahi. What is stem cell?. An undifferentiated cell of a . multicellular. organism which is capable of giving rise to indefinitely more cells of the same type, and from which certain other kinds of cell arise by differentiation.. Developmental stages of humans. Fertilization. Zygote. It is a fertilized . egg . Diploid (2n). Female . pronuclei. Male . pronuclei. Amphimixis. Developmental stages of humans. Zona. . pellucida. Surrounds the zygote. Explain prenatal development from fertilization to birth. Understand different biological process’ in all phases of prenatal development. Define key vocabulary. Chart different phases in . somitogenesis. Formation of the Digestive Cavity. At the Blastula stage, the embryo forms a fluid filled ball of cells. During Gastrulation, the blastula caves in on one end to form a Gastrula. The cavity formed by gastrulation will form a digestive cavity or digestive tract.. of the ovule Of the flowers 96% had pistils of apparently normal size and structure. In 4% of the flowers the solitary ovule was borne externally on the ovary. Each of the normal pistils contained a of the ovuleOf the flowers 96 had pistils of apparently normal size and structure In 4 of the flowers the solitary ovule was borne externally on the ovary Each of the normal pistils contained a single John B. Cole,. 1,*. Derek M. Bickhart,. 2. Kelsey N. Clark,. 3. Jana L. Hutchison,. 2. Jennifer C. McClure,. 2. Daniel J. Null,. 2. and M. Sofía Ortega. 3. 1. Animal Genomics and Improvement Laboratory, ARS, USDA, Beltsville, MD. As the fluid inside the newly formed blastocyst increases, so does the number of cells, and the combination of these two features causes a progressive enlargement of the blastocyst and it’s cavity with a consequent progressive thinning of the zona . Lab 11. Hormonal controls of the menstrual (ovarian and uterine) cycles . Fertilization, implantation, and early development. Final lab practical this time next week. Ovulation. Ovarian and Menstrual Cycle Regulation.