What is a lod score?
A) determination of how often double crossovers occur
B) determination of how often a gene mapping experiment gives the correct results
C) a method using cell fusion to determine on which chromosome a gene resides
D) determination of the probability that two traits are linked by analyzing pedigrees
E) a calculation to show how much interference is occurring in crossover formation
Answer: D
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ABO blood group determination is an example of
A. epistasis. B. incomplete dominance. C. polygenic inheritance. D. multiple alleles. E. pleiotropy.
The H substance is needed for the proper phenotypic expression of the A, B, and AB blood types in the ABO blood typing system in humans. Individuals who are recessive for the H substance (hh) will have a type O phenotype, even if they have the A and/or B alleles. Two individuals, each with type AB blood and heterozygous at the H locus have children. What is the probability they will have a child who is phenotypically type O?
A. No chance B. 100% C. 3/16 D. 4/16 E. 6/16
The tough, two-layered sac of connective tissue that holds the heart is called the ________
a. ventricle b. atrium c. myocardium d. pericardium
Which of the following did Nam-Hai Chua and his colleagues demonstrate to be part of the abscisic
acid response pathway?
a. cyclic ADP-ribose b. Ca2+ c. protein kinases d. cyclic ADP-ribose and protein kinases e. cyclic ADP-ribose, Ca2+ and protein kinases