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Ch.20 Quantitative GeneticsWorksheetSee all chapters
All Chapters
Ch.1 Introduction to Genetics
Ch.2 Mendel's Laws of Inheritance
Ch.3 Extensions to Mendelian Inheritance
Ch.4 Genetic Mapping and Linkage
Ch.5 Genetics of Bacteria and Viruses
Ch.6 Chromosomal Variation
Ch.7 DNA and Chromosome Structure
Ch.8 DNA Replication
Ch.9 Mitosis and Meiosis
Ch.10 Transcription
Ch.11 Translation
Ch.12 Gene Regulation in Prokaryotes
Ch.13 Gene Regulation in Eukaryotes
Ch.14 Genetic Control of Development
Ch.15 Genomes and Genomics
Ch.16 Transposable Elements
Ch.17 Mutation, Repair, and Recombination
Ch.18 Molecular Genetic Tools
Ch.19 Cancer Genetics
Ch.20 Quantitative Genetics
Ch.21 Population Genetics
Ch.22 Evolutionary Genetics
Mathematical Measurements
Traits and Variance
Analyzing Trait Variance
QTL Mapping

Concept #1: Calculating Heritability

Concept #2: Artificial Selection

Concept #3: Twin Studies

Practice: A chicken breeder has a population of chickens where the average number of eggs laid per hen per month is 34. The narrow-sense heritability is 0.75. With this information is it likely that a breeder could select for an increase in eggs per hen laid each month?

Practice: The narrow-sense heritability of the number of seeds per flower is 0.9. The mean of the population is 6.0 seeds per flower. A flower breeder crosses one flower with 7 seeds to another plant with 9 seeds. What is the expected number of seeds per flower in the offspring of this cross?

Practice: Heritability calculations were calculated for a variety of different traits. Which of the following traits would respond best to selection?