The hairline of some people drops downward near the center of the forehead and forms a distinct point. This condition is known as widow's peak. The alternative phenotype is a continuous hairline that does not drop down. A person with widow's peak always has an affected parent. Explain the inheritance pattern of widow's peak
What will be an ideal response?
The students can explore various inheritance patterns with this problem. However, since only two phenotypes are possible and a person with widow's peak always has a parent with widow's peak, the best answer is that widow's peak is inherited as a dominant allele.
Analyze and Evaluate the Concepts (Essay)
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The uptake of water and mineral ions from the soil occurs primarily at the ____
a. endodermis b. root cap c. quiescent center d. pericycle e. root hairs
The mechanism of DNA synthesis differs between the two new daughter strands during replication. This is due to the fact that
A. the DNA strands run antiparallel to each other and the DNA polymerase can only add nucleotides to the 3' end of the growing strand. B. both daughter strands can't extend toward the replication fork because there would not be room for two DNA polymerase enzymes. C. one RNA primer attaches to the 5' end of the parent strand and the other primer to the 3' end. D. both RNA primers attach to the 3' end of the template strands, which are at opposite ends from each other.
Upon Darwin's return from his voyage he spent time doing which of the following?
a. breeding dogs b. breeding pigeons c. breeding barnacles d. breeding goldfish e. breeding garden peas
Ethanol is an inhibitor of ADH. Therefore, a
person consuming a mixed drink excretes a. less water because ADH promotes reabsorption. b. the alcohol because ADH cannot degrade it. c. ketone bodies formed from the alcohol. d. more water because ADH normally promotes reabsorption. e. more water plus the alcohol due to the ADH inhibition.