Biology Revision.

*14.1 meiosis, Medelian heritage *14.2 variation *14.3 population divisortics *14.4 classification *14.5 ecosystems *14.6 photosynthesis *14.7 food handcuffs and webs *14.8 respiration *14.9 carbon and nitrogen cycles *14.10 deforestation Medelian Experiment He discover pea plants were either full sized (t every last(predicate)) or really short (dwarf) He used self stuffing to find sheer BREEDING PLANTS Then bringd number by FERTILISATION All plants grew tall So he took the takings and traverse them with each other. The offspring were ¾ Tall and ¼ Dwarf story Each plant has 2 genes Genes institutionalize instructions to organisms-grow tall grow short If a plant has both type of gene the GROW eminent gene is DOMINANT the GROW inadequate is RECESSIVE To visual aspect crosses we use symbols P-pargonnts T-grow tall t-grow short GAMETES: T & T x t & t F1: Tt all offspring are TALL 2nd cross Tt x Tt GAMETES: T t x T t F2: TT, Tt, Tt, tt ¼ will be DWARF P unnett squares/diagrams 1.Mendels analyze (second part) using PUNNETT SQUARES 2.Showing CODOMINANCE-Feather colour in chickens is controlled by CODOMINANT ALLELES C -allele for dustcloth feather C -allele for black 3.Showing MULTIPLE ALLELES-Blood group is controlled by a gene which has 3 alleles- I & I are co dominant and I is recessive 4.

energize LINKAGE- X chromosomes are LARGE, y chromosomes are SMALL-Male humans XY Women XX 5.DIHYBRID inheritance-All previous examples dealt with the inheritance of a maven characteristic e.g. MONOHYBRID INHERITANCE-With DIHYBRID INHERITANCE we are looking at the inher itance of a fit of characteristics. Meiosi! s Legend: Illustration of the process by which a ace parent diploid cellular telephone (Both homologous chromosomes) divides to produce quatern daughter haploids cells (One homologous chromosome of the pair). Meiosis is the type of cell division by which germ cells (eggs and sperm) are produced. Meiosis involves a... If you regard to get a full essay, order it on our website: BestEssayCheap.com

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