Inheritance 0.0 / 5 ? BiologyDNA, genetics and evolutionA2/A-levelAQA Created by: HindleycCreated on: 30-03-19 18:10 What is the genotype? Genetic makeup/ constitution of an organism describing all the alleles that an organism contains 1 of 34 What does it set? Limits within which the characteristics of an individual may vary 2 of 34 What is any change to the genotype as a result of a change to the DNA? A mutation 3 of 34 How may it be inherited ? If it occurs in the formation of gametes 4 of 34 What is the phenotype Expression of this genetic constitution (genotype) and its interaction with the environment 5 of 34 What is it then Observable characteristics of an organism 6 of 34 What can alter an organisms appearance Environment 7 of 34 What is any change to the phenotype that doesn't affect genotype and isn't inherited by future generations? Modification 8 of 34 What is a gene Section of DNA that is a sequence of nucleotide bases usually determining a single characteristic of an organism 9 of 34 How does it do it Coding for particular polypeptides that are needed in the biochemical pathway that leads to the production of the characteristic 10 of 34 What does gene exist in 2 or occasionally more different forms called alleles 11 of 34 What may there be Many alleles of a single gene 12 of 34 What can they be Dominant, recessive or co-dominant 13 of 34 What is the locus? Position of a gene on a chromosome 14 of 34 In most cases if 2 alleles in the genotype are different what happens? Only 1 shows itself in the phenotype 15 of 34 What is allele that shows itself or is expressed said to be Dominant 16 of 34 What is dominant gene always represented by Capital form of letter 17 of 34 What is allele that isn't expressed said to be Recessive - represent with lowercase letter 18 of 34 What is a homozygous organism with 2 dominant alleles called Homozygous dominant 19 of 34 What is 2 recessive alleles Homozygous recessive 20 of 34 When is effect only seen in phenotype of a diploid organism Only when it occurs in presence of an identical allele 21 of 34 When gametes (Sex cells) are produced what are they? Haploid (only have half of DNA) 22 of 34 What it will therefore only contain 1 allele of the gene 23 of 34 So how many from each parent will be passed onto their offspring 1 24 of 34 What will diploid then contain 2 alleles of each gene 25 of 34 What is CF recessive 26 of 34 What is polydactyl Dominant 27 of 34 What is Chi squared Determining whether experimentally determined data fits results expected from theory 28 of 34 What type of test Goodness of fit 29 of 34 Calc Sum of (O-E)^2/E 30 of 34 What do you use Number of individuals 31 of 34 DOF? Number independent random variables involved -1 32 of 34 or Number of classes of offspring -1 33 of 34 When do you reject null If calculated chi squared value exceeds critical value 34 of 34
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