AQA A Level Biology復習筆記7.3.5 Evolution
Evolution The?allele frequencies?(within the gene pool) of a population can?change?over time due to processes such as natural selection When the?allele frequencies?of a population change?suf...
AQA A Level Biology復習筆記7.3.4 Types of Selection
Types of Selection & Their Effects Environmental factors that affect the chance of survival of an organism are referred to as?selection pressures For example, there could be high levels ...
AQA A Level Biology復習筆記7.3.3 Selective Advantage
Selective Advantage Every individual within a species population has the?potential to reproduce?and have offspring In reality, however, there are many?environmental factors?that?prevent?ever...
AQA A Level Biology復習筆記7.3.2 Natural Selection
Natural Selection Every individual within a species population has the?potential to reproduce?and have offspring which contribute to population growth If all the offspring of every individua...
AQA A Level Biology復習筆記7.2.3 Hardy-Weinberg
Natural Selection: Hardy-Weinberg Principle The Hardy-Weinberg principle states that if certain conditions are met then the?allele frequencies of a gene within a population will not change f...
AQA A Level Biology復習筆記7.2.2 Gene Pools & Allele Frequency
Gene Pools & Allele Frequency Gene pools The?phenotype?of an organism is dependent on its?genotype?and the environmental influence on the organism Members of the?same species?will have t...
AQA A Level Biology復習筆記7.1.6 The Chi-squared Test
Predicting Inheritance: Chi-squared Test The?difference between expected and observed results?in experiments can be statistically significant or insignificant (happened by chance) If the dif...
AQA A Level Biology復習筆記7.1.5 Investigating Genetic Ratios
Apparatus & Techniques: Investigating Genetic Ratios Known information about genotypes, phenotypes and the process of meiosis can be used to make?predictions?about the phenotypes of offs...
AQA A Level Biology復習筆記7.1.4 Predicting Inheritance: Test Crosses
Predicting Inheritance: Test Crosses A test cross can be used to?deduce the?genotype?of an unknown individual that is expressing a dominant?phenotype The individual in question is crossed wi...
