ANSC 4395 EXAM 3 QUESTIONS WITH VERIFIEDANSWERS GRADED A+
2025/2026
Simply-Inherited Traits - (answers)- traits affected by only a few genes
- qualitative or categorical
- rarely quantitative
- typically not affected by the environment
Polygenic Traits - (answers)- affected by many genes with no gene having an overriding influence
- typically quantitative or continuous in expression
- greatly influenced by the environment
Threshold Traits - (answers)polygenic traits that have categorical phenotypes
Which are more important? - (answers)- typically, polygenic traits
- traits that determine productivity & profitability
Test Matings - (answers)- matings designed to reveal the genotype of an individual for a small number of
loci
- simply-inherited traits
3 general types of test matings to determine if an individual is heterozygous: - (answers)1) mating to
recessives
2) mating to heterozygots
3) mating a sire to his daughters
the method with the highest probability of detection: - (answers)mating to recessives
, Quantitative - (answers)- measured on a numerical scale
- under the influence of many genes and the environment
- express a continuous distribution from one extreme to the other
- no discreet phenotypic classes like qualitative traits
"normal" distribution or "bell curve" - (answers)- phenotypes will closely approximate a statistical
distribution
- allows us to use statistics to describe populations and their genetic makeup
Statistic - (answers)estimate of a parameter
Parameter - (answers)a value that describes a population
Population - (answers)all the members of a group
Sample - (answers)- subset of a population
- can seldom measure all the members of a population
Variables - (answers)whatever trait is measured on a group of individuals
2 types of variables: - (answers)1) discrete
2) continuous
Discrete Variables - (answers)has distinct classes
2025/2026
Simply-Inherited Traits - (answers)- traits affected by only a few genes
- qualitative or categorical
- rarely quantitative
- typically not affected by the environment
Polygenic Traits - (answers)- affected by many genes with no gene having an overriding influence
- typically quantitative or continuous in expression
- greatly influenced by the environment
Threshold Traits - (answers)polygenic traits that have categorical phenotypes
Which are more important? - (answers)- typically, polygenic traits
- traits that determine productivity & profitability
Test Matings - (answers)- matings designed to reveal the genotype of an individual for a small number of
loci
- simply-inherited traits
3 general types of test matings to determine if an individual is heterozygous: - (answers)1) mating to
recessives
2) mating to heterozygots
3) mating a sire to his daughters
the method with the highest probability of detection: - (answers)mating to recessives
, Quantitative - (answers)- measured on a numerical scale
- under the influence of many genes and the environment
- express a continuous distribution from one extreme to the other
- no discreet phenotypic classes like qualitative traits
"normal" distribution or "bell curve" - (answers)- phenotypes will closely approximate a statistical
distribution
- allows us to use statistics to describe populations and their genetic makeup
Statistic - (answers)estimate of a parameter
Parameter - (answers)a value that describes a population
Population - (answers)all the members of a group
Sample - (answers)- subset of a population
- can seldom measure all the members of a population
Variables - (answers)whatever trait is measured on a group of individuals
2 types of variables: - (answers)1) discrete
2) continuous
Discrete Variables - (answers)has distinct classes
