Crocodiles are living representatives of which of the following lineages?
a. anapsids
b. archosaurs
c. lepidosaurs
d. synapsids
e. dinosaurs
B
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The multiple genetic and environmental factors affecting complex traits imply that different people can have the same disease for different reasons
A. true B. false
Recombination frequency for two genes is a function of the ____
a. distance between the two genes on a single chromosome b. overall size of the chromosome on which the genes are located c. distance between the two chromosomes on which the two genes are located d. relative sizes of the two chromosomes on which the two genes are located e. sex of the parent that supplies each gene
Ionic bonds are important in biological structures. Which of the following pairs of molecules would form an ionic bond?
A) two water molecules B) two amino acids with oppositely charged functional groups C) two different stereoisomers of the same sugar D) two phospholipids E) a water molecule and a lipid
In Down syndrome,
a. as the age of the mother increases, the chance of the defect occurring in the unborn children increases. b. the age of the father usually has an equal influence on the defect. c. most embryos abort before complete term. d. a person with the defect cannot have a normal child. e. 80% of trisomic 21 babies are born to women over the age of 40.