Human fingerprints are a good example of a multifactorial trait. What evidence can you cite to suggest that fingerprints are partially influenced by genes? How about evidence suggesting that they are partially influenced by environmental factors?
What will be an ideal response?
Observations suggesting there is a genetic component to fingerprint patterns include consistent population differences in the frequency of basic patterns (whorls, arches, loops). However, even identical twins have unique fingerprints, indicating that they are also determined by environmental factors.
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The coefficient of inbreeding (F) can be used to estimate the proportion of loci that are __________
A) fixed in a population B) homozygous identical by descent C) heterozygous by descent D) lethal alleles E) recessive
Cilia lining the respiratory tubes beat mucus upward in order to:
a. moisten the bronchioles. b. conduct the mucus that contains particles to the pharynx and away from the lungs. c. provide mucus to the lungs to prevent them from dehydrating. d. lubricate the throat for easier swallowing. e. promote gas exchange by providing mucus for the respiratory surfaces.
Your roommate is experiencing heartburn and asks you to purchase her an antacid. Chemically speaking, how do you know that the antacid will help eliminate her pain?
A) It has a low pH to balance the acidity in her digestive tract. B) It is a buffer and will prevent the pH in her digestive tract from changing. C) It is probably high in H+. D) It has a higher OH- concentration to increase the pH in her digestive tract.
The process of fertilization produces a/an:
A) blastula. B) zygote. C) embryo. D) morula. E) gastrula.