'Literary Physics\r'

'Syllabus dot point| Notes| * solve information from secondary sources to describe an example of mark within a species and apologise the purpose of this crown of thorns| Hybridisation †two transmissibleally different strains of an existence be crossed to take offspring with enviable characteristics. i. e. cross breeding cattle to produce conk out meat, which will benefit for human consumption discriminating breeding of sheep to produce merino sheep which are hybrids produced by interbreeding early(a) sheep varieties.Interbreeding other varieties of corn to produce the resultant hybrid corn that was hardy and produced abundant fruit. | * describe the process of deoxyribonucleic acid replication and explain its signifi sightce| * DNA double helix unwinds * DNA unzips * Nucleotides are added to to each one and only(a) single strandDNA replication ensures that the elementtic information is maintained. | * explain the relationship between proteins and polypeptides| A protein is made up of angiotensin converting enzyme or to a greater extent polypeptides.A polypeptide is made up of a chain of many amino acids. | * analyse information from secondary sources to precis the evidence that led to Beadle and Tatum’s ‘one agent †one protein’ hypothesis and to explain why this was adapted to the ‘one element †one polypeptide’ hypothesis| Beadle and Tatum cogitate that for each defective enzyme there was one gene on one specific area of a chromosome that had been mutated by irradiation. This led to their ‘one gene-one enzyme’ theory.The ‘one gene †one enzyme’ hypothesis changed to the ‘one gene †one protein’ hypothesis, once it was demonstrated that there are other proteins besides enzymes that are en engraved by genes. Thomas Morgans proceeding led to a greater understanding of how genes are arranged on chromosomes and how genetic material can be interchan ge (during crossroad over) in meiosis. Morgan’s experiments showed without any doubt that: * the gene for eye touch in fruit flies is located on the X chromosome, and * hereditary factors can be exchanged between the X chromosomes of an individual.Morgan experimented with fruit flies (Drosophilia melanogaster) and immovable that genes are carried on chromosomes. He used crossing over to determine locations of genes. He discovered that shake chromosomes look different to each other, and that eye deform gene in Drosophilia was located on the X chromosome, leading to the discovery of sex linkage. Boveri experimented with sea urchins and showed that a complete set of chromosomes was needed for normal evolution and that the NUCLEUS of a cell was concerned with inheritance.He postulated that each chromosome was different, chromosomes were transferred from one generation to the next during cell division, and that chromosomes mustiness carry the many hereditary factors. Sutton †he notice during meiosis that chromosomes behaved randomly and gametes receive only one chromosome from each pair. | Distinguish between the terms gene and allelomorph| A gene is a voice of DNA that codes for proteins that expresses itself as the phenotype for example, two genes for eye colour. An allele is the alternative forms of a gene, i. e. for eye colour, B would code for blue while b for brown. |\r\n'