The Hardy Weinberg Equation (Part 2) | A Level Biology | Biology Lessons скачать в хорошем качестве

The Hardy Weinberg Equation (Part 2) | A Level Biology | Biology Lessons

PLEASE SUPPORT THE CHANNEL My videos are funded by people like you. If you enjoy them, please help me make more: - You can support me by making a donation "Buy me a Coffee" here: - https://buy.stripe.com/eVa03tcUxeRS2T... and don't forget you can download worksheets at learnbiology.net too! Thanks for your support! The Hardy Weinberg Equation (Part 2) | A Level Biology | Biology Lessons In this lesson: - 1. Use the Hardy-Weinberg equation to estimate allele / genotype frequencies within a population. In the previous lesson we outlined the key idea behind the Hardy-Weinberg Principle. In essence – that the equation is used to calculate frequencies of alleles (or genotypes) within a particular population… We also showed how Hardy-Weinberg related to a simple monohybrid cross and we were able to assign the appropriate “letters” (from the Hardy-Weinberg equation) to the genotypes of our population of rabbits… Some key terms: - Population: a group of individuals (organisms) of the SAME species living and reproducing in a defined area: - e.g. the population of Fallow deer (Dama dama) in specified are in Scotland… Phenotype: the physical expression of a genotype (the observable expression of a particular trait, e.g. Large antlers). Genotype: the set of alleles at a single locus. (i.e. Homozygous Dominant, Homozygous Recessive and Heterozygous). Allele: Alternative form of a gene. Gene pool: the complete range of alleles present in a population. So, if we only had 3 individuals in our population [1 homozygous dominant, 1 heterozygous and 1 homozygous recessive] and of course for simplicity we only consider the “Antler Allele” there would only be 6 alleles present in the gene pool for this population… and of course, if there were 600 individuals in our population then there would be 1200 alleles in the gene pool… Allele Frequency: the relative proportions of particular alleles within a specified population. e.g. the occurrence of dominant alleles and recessive alleles that are attributed to a specific trait, within the given population… In an exam, you could be asked to work out - a whole range of things, such as frequencies of alleles, or genotypes, or phenotypes, or percentages of those things… So, let’s explore further the problem of Brachydactyly… with an exam style question... Hardy-Weinberg Equilibrium Exam style questions. Visit the Website (www.learnbiology.net) where you can you can join up and download revision notes and accompanying lesson booklets with knowledge check and exam style questions with answers! If you are learning (or teaching) A Level biology then this is a great place to get loads of subject knowledge and resources. #ALevelbiology #Learnbiologynet #Biology