* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Excellence
Quantitative trait locus wikipedia , lookup
Pathogenomics wikipedia , lookup
Genetic engineering wikipedia , lookup
DNA barcoding wikipedia , lookup
Gene expression profiling wikipedia , lookup
Metagenomics wikipedia , lookup
Y chromosome wikipedia , lookup
History of genetic engineering wikipedia , lookup
Site-specific recombinase technology wikipedia , lookup
Polymorphism (biology) wikipedia , lookup
Biology and consumer behaviour wikipedia , lookup
Skewed X-inactivation wikipedia , lookup
Human genetic variation wikipedia , lookup
Hardy–Weinberg principle wikipedia , lookup
Neocentromere wikipedia , lookup
Hybrid (biology) wikipedia , lookup
Genomic imprinting wikipedia , lookup
Epigenetics of human development wikipedia , lookup
Frameshift mutation wikipedia , lookup
Gene expression programming wikipedia , lookup
Genome evolution wikipedia , lookup
Designer baby wikipedia , lookup
X-inactivation wikipedia , lookup
Artificial gene synthesis wikipedia , lookup
Genetic drift wikipedia , lookup
Genome (book) wikipedia , lookup
Population genetics wikipedia , lookup
Koinophilia wikipedia , lookup
Dominance (genetics) wikipedia , lookup
Low Excellence Introductory paragraph defines gene and states the relationship between a gene and an allele. Allele examples relating to the question on flower colour are clearly stated. Diagram does not link allele and base sequence. Needs to link base sequences with genes. Achievement criteria met. One of three Merit criteria achieved therefore an overall Achievement grade for Question One. Definition of gametes and role in number of chromosomes explained. Chromosome separation at meiosis covered. Reference to benefit for population if genetic variation. Clear Merit overall. Excellence would be gained if candidate noted the importance of constant reshuffling by meiosis to a species. Dominant allele defined. Evidence of cleft chin being dominant. Clear explanation of requirement for A to be heterozygous. Punnett square, probability, and sample size well covered. Merits in (a) and (b), plus Excellence in (c) give an overall Excellence grade for Question Three. Confusion in mutation definition - a mutation is a “change”, not necessarily wrong. Clear understanding that inheritable mutations require gametes to pass them on to the next generation. Link with genetic change (mutation) and variation. Clear understanding that large leaved individuals of species A are better adapted to survive and reproduce. This enables species A to survive. Excellence opportunities obtained by giving Excellence answers overall in Question Four. High Excellence Gene and allele defined and related to flower colours. Response covers base sequences on genes determining phenotype. Diagram showing relationship between DNA, genes, and alleles. All criteria for Excellence met (Three Merit plus one Excellence). Gamete definition and role in chromosome numbers of cell stated. Meiosis linked to chromosome separation. Demonstrates understanding that variation aids species survival in environmental change. All Merit criteria met along with Excellence criteria resulting in Excellence overall. Good explanation. Clear reasoning to support cleft chin dominance. Clear explanation linking A with Generation 3. Punnett square, probability, and sample size covered. Two Merit opportunities plus one Excellence opportunity reached, giving Excellence grade overall for Question Three. Definition acceptable. No link with mutation being passed on by gametes. Recognises large leaf sizes will be adapted to survive and ensure survival of individuals and the species. Achievement overall, only one opportunity reached beyond Achievement level.