In this article we will discuss about:- 1. Meaning of Placenta 2. Types of Placenta 3. Organogenesis 4. Functions. Meaning of Placenta: The embryo, specially in eutherian mammals, becomes implanted to the uterine wall. The process of implantation involves tissue interaction and establishment of connection between the uterine wall and the extraembryonic membranes. The region […]
Formation of Placenta | Embryology
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4 Main Developmental Organs in Vertebrates | Embryology
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The following points highlight the four main developmental organs in vertebrates. The developmental organs are: 1. Brain 2. Eye 3. Heart 4. Kidney. Developmental Organ # 1. Brain: The first important morphogenetic change following gastrulation is the development of the central nervous system. The central nervous system starts as a simple tubular nerve tube which, […]
Crossing Over in Genes within Chromosome | Genetics
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In this article we will discuss about:- 1. Meaning of Crossing Over 2. Double Cross-Over 3. Cytological Basis 4. Cytological Evidence 5. Somatic Crossover 6. Different Theories on the Mechanism 7. Theories that Explain the Happenings 8. Chiasma Formation—the Theories 9. No Cross-over in Drosophila Males 10. Experimental Conditions. Contents: Meaning of Crossing Over Double […]
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