18 Questions
What is the result of crossing the two genetically engineered rice strains?
A strain expressing all of the enzymes in the pathway
What is the term for the collection of all alleles in the members of a population?
Gene pool
What is the fundamental principle of Mendelian genetics that explains the segregation of alleles in reproductive cells?
The segregation of alleles is random and independent of other pairs
In a dihybrid testcross, what is the expected ratio of the four phenotypes in the progeny?
1:1:1:1
What is the movement of alleles between populations when individuals migrate and mate?
Gene flow
What is the probability rule that adds the probabilities of two mutually exclusive events?
Addition Rule
What is the focus of population genetics?
The study of the genetics of a population and how the alleles vary with time
What can frequencies in population genetics be calculated for?
Alleles, genotypes, or phenotypes
In a dihybrid cross, how many types of gametes are produced by the double heterozygotes, and in what proportion?
Four types of gametes, in a 1:1:1:1 ratio
What is the probability that the genotype of a seed in the F2 progeny of Ww heterozygotes is either WW or Ww?
3/4
What type of mutations are included in frequencies of gene variants in a population?
Both single-base mutations and numbers of short, repeated DNA sequences
What is the term for the production of gametes with all possible genotypes in approximately equal proportions?
Independent Assortment
What is the primary goal of a mutant screen?
To isolate multiple mutations affecting a particular trait
What does it mean if the resulting cell or organism is nonmutant in a complementation test?
The mutations are in different genes
What is the term for the most common phenotype or genotype in a natural population?
Wildtype
What is the purpose of a complementation test?
To determine if mutations are in the same or different genes
What is a heritable biological entity that differs from the wildtype?
A mutant
What did Beadle and Tatum pioneer in the field of genetics?
The use of genetic methods to identify the genes whose products participate in pathways of metabolism, development, behavior, or other biological processes
Understand the concept of independent assortment in Mendelian genetics, including the segregation of alleles and the formation of reproductive cells. Learn how dihybrid crosses and testcrosses demonstrate this principle, and how it affects the progeny phenotypes. Test your knowledge of Mendel's laws and genetic inheritance!
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