If an X-linked recessive gene is expressed in 4
percent of the men, what proportion of women would
express the recessive trait? What will be an ideal response?
Answer: 4/100 x 4/100 = 16/10,000, or 4 out of 2,500
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You are studying a protein that you call Protein X. There is an aspartic acid at a key position in Protein X which is important in the folding and stabilization of that protein
If this aspartic acid is changed to a different amino acid, which one of the following amino acid substitutions is most likely to allow the protein to fold normally? A. threonine B. glycine C. arginine D. glutamic acid E. serine
The apple maggot's natural host plant is the hawthorne; however, over the past 150 years, new populations were found
that feed on apples and cherries. This is an example of ____ speciation via the development of ____.
a. sympatric; allopolyploidy b. allopatric; host races c. sympatric; host races d. allopatric; autopolyploidy e. sympatric; autopolyploidy
Which type of graded potential moves the cell closer to having an action potential?
a. EPSP b. IPSP c. inhibitory potential d. hyperpolarization e. potentials that move the cell away from threshold
Explain the features that would have enabled Homo ergaster to have migrated out of Africa.
What will be an ideal response?