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structure of chloroplast important 🔥 @AmbitionMBBS 🩺 ❤️ Hope so it's helpful 👍

structure of Mitochondira important 🔥 @AmbitionMBBS 🩺 ❤️ Hope so it's helpful 👍

Important 👆 @AmbitionMBBS

abse daily ki 1 post esi aayegi..jo aapke exam ke point of view se bhot jyda important rahegi...

Chromosomal Disorders in Humans :- @AmbitionMBBS 🩺 The chromosomal disorders on the other hand are caused due to absence or excess or abnormal arrangement of one or more chromosomes. 1. Down’s Syndrome:- Typically, the nucleus of each cell contains 23 pairs of chromosomes, half of which are inherited from each parent. Down syndrome occurs when an individual has a full or partial extra copy of chromosome 21. This failure of segregation of chromatids during cell division cycle results in the gain or loss of a chromosome(s), called aneuploidy. It was first described in 1866 by Langdon Down. The disorder develop due to trisomy of chromosome number 21. Trisomic condition arises due to the formation of n+1 male or female gamete by non-disjunction and the subsequent fertilization by a normal (n) gamete. It is characterized by:- a. Short stature b. Small round head c. Furrowed tongue d. Partially open mouth e. Broad palm with characteristic palm crease f. Many ‘loops’ on finger tips g. Big and wrinkled tongue h. Physical (underdeveloped gonads and genitals, loose joints), psychomotor and mental development is retarded 2. Turner’s Syndrome:- Turner syndrome is a chromosomal condition that affects development in females. The disorder is due to monosomy. It appears due to fusion of abnormal egg (22+0) and a normal sperm (22+X) or a normal egg (22+X) and abnormal sperm (22+0). Such females are sterile as ovaries are rudimentary besides other features including lack of other secondary sexual characters. 3. Klinefelter’s Syndrome:- It is caused due to the presence of an additional copy of X-chromosome resulting into 44+XXY type chromosome complement. The defect appears due to union of an abnormal egg (22+XX) and a normal sperm (22+Y) or normal egg (22+X) and abnormal sperm (22+XY). Such persons are sterile males with overall masculine development and some female characteristics E.g. Feminine pitched voice, development of breast or gynaecomastia. @AmbitionMBBS 🩺 😌❤️ Hope so it's helpful ☺️👍

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❤️SOME TERMS RELATED TO EVOLUTION❤️ 💠Adaptation: 🔶Changing to fit a niche or survive in an environment 💠Anatomy: 🔶Study of the structures of organisms 💠Artificial Selection: 🔶Characteristics selected by humans 💠Biogeography: 🔶Study of how species are distributed across the Earth 💠Biological Species: 🔶Individuals that can interbreed and produce viable offspring 💠Catastrophism: 🔶Changes in species that happen because of quick and often violent natural phenomena 💠Cladistics: 🔶Method of classifying species in groups based on ancestral relationships 💠Cladogram: 🔶Diagram of how species are related 💠Coevolution: 🔶One species changing in response to changes in another species that it interacts with, particularly predator/prey relationships 💠Creationism: 🔶Belief that a higher power created all life 💠Darwinism: 🔶Term commonly used as a synonym for evolution 💠Descent With Modification: 🔶Passing down traits that might change over time 💠Directional Selection: 🔶Type of natural selection in which an extreme characteristic is favored 💠Disruptive Selection: 🔶Type of natural selection that favors both extremes and selects against the average characteristics 💠Embryology: 🔶Study of the earliest stages of development of an organism 💠Endosymbiotic Theory: 🔶Currently accepted theory as to how cells evolved 💠Eukaryote: 🔶Organism made of cells that have membrane-bound organelles 💠Evolution: 🔶Change in populations over time 💠Fossil Record: 🔶All known traces of past life ever found 💠Fundamental Niche: 🔶All available roles an individual can play in an ecosystem 💠Genetics: 🔶Study of traits and how they are passed down from generation to generation 💠Gradualism: 🔶Changes in species that happen over long periods of time 💠Habitat: 🔶Area in which an organism lives 💠Homologous Structures: 🔶Body parts on different species that are similar and most likely evolved from a common ancestor 💠Hydrothermal Vents: 🔶Very hot areas in the ocean where primitive life might have begun 💠Intelligent Design: 🔶Belief that a higher power created life and its changes 💠Macroevolution: 🔶Changes in populations at the species level, including ancestral relationships 💠Mass Extinction: 🔶Event in which large numbers of species died out completely 💠Microevolution: 🔶Changes in species at a molecular or gene level..... 💝SHARE AND SUPPORT💝 @AmbitionMBBS 🩺