How to calculate Phenotype and Genotype Frequencies

Any organism is a by-product of both its genetic makeup and the environment. To understand this in detail, we must first appreciate some basic genetic vocabulary and concepts. Here, we provide definitions for the terms genotype and phenotype, discuss their relationship and take a look at why and how we might choose to study them. What is the definition of a genotype? In biology, a gene is a section of DNA that encodes a trait. The precise arrangement of nucleotides (each composed of a phosphate group, sugar and a base) in a gene can differ between copies of the same gene. Therefore, a gene can exist in different forms across organisms. These different forms are known as alleles. The exact fixed position on the chromosome that contains a particular gene is known as a locus. A diploid organism either inherits two copies of the same allele or one copy of two different alleles from their parents. If an individual inherits two identical alleles, their genotype is said to be homozygous at that locus. However, if they possess two different alleles, their genotype is classed as heterozygous for that locus. Alleles of the same gene are either autosomal dominant or recessive. An autosomal dominant allele will always be preferentially expressed over a recessive allele. Problem: A/a, B/b, D/d, and E/e are loci on four separate automosomes. If a cross AABbDdee x AaBbddEe is performed, what fraction of the progeny will: A) Have the phenotype ABde B) Have the genotype AabbddEe? #Genotype #Phenotype #genotypesAndPhenotypes #genotypeVsPhenotype #Alleles #Genes #Gene #expression #forHighSchool #biology #traits #allele #heredity #Dna #whatIsAnAllele #whatIsAGene #PTC #PTCTaster #Dominant #recessive #trait #dominantTrait #recessiveTrait #Genetics #Chromosomes #karyotype #Chromosome #ptcPaper #dominantVsRecessiveTraits #amoebaSisters #cartoon #animation #howTraitsAreInherited #geneticsLab #differenceBetweenAlleleAndGene #highSchoolBiology