If the recombination frequency between two genes is close to 50%, what could be true about the location of the two genes? (Select all that apply.)
A) They are on nonhomologous chromosomes.
B) They are far apart on the same chromosome.
C) They are very close together on the same chromosome.
D) None of the choices could be true.
A) They are on nonhomologous chromosomes,
B) They are far apart on the same chromosome.
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Possible gamete genotypes produced by an individual of genotype PpDd are
(a) Pp and Dd. (b) all PpDd. (c) PD and pd. (d) PD, Pd, pD, and pd.
All of the following are associated with replicons except
A) origin of replication. B) single-strand binding proteins. C) initiator proteins. D) minichromosome maintenance proteins. E) helicase loaders.
In humans, the majority of a transcription unit is composed of ____
a. exons b. introns c. promoter regions d. start codons e. regulatory elements
Which type of molecule can diffuse through the blood-brain barrier?
A) very small molecules B) glucose molecules C) hydrophilic molecules and glucose molecules D) very small molecules and lipophilic molecules E) lipophilic molecules