Your parents are both heterozygous for the recessive disorder phenylketonuria (PKU). What is the probability that you
will have the disorder?
a. 25%
b. 50%
c. 75%
d. 100%
e. 25% if your three siblings are healthy; 75% if your siblings also have the disorder
ANSWER: a
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a. radiation of heat into the atmosphere. b. evaporation of water. c. absorption by the lithosphere. d. reflection of heat into space.
Hyaline cartilage is found in
a. intervertebral discs. b. the outer flaps of the ears. c. adipose tissue. d. the trachea. e. in the knee joint.
If a researcher is cloning a sequence by using pUC and uses the plasmid to transform bacteria, which are then plated on X-gal medium, would the recombinant plasmids be found in blue or white colonies or both?
What will be an ideal response?
Among mammals, it is generally true that _____
A) all types of foods begin their enzymatic digestion in the mouth B) after leaving the oral cavity, the bolus enters the larynx C) the epiglottis prevents swallowed food from entering the trachea D) the trachea leads to the esophagus and then to the stomach