Answer the following statements true (T) or false (F)
1. A person with blood type O can donate blood to people of any blood type.
2. Pea plants cannot self-fertilize because an individual plant is either female or male, having either ovaries or stamens but not both.
3. Pedigree analysis is important for studying human traits because of the relatively small size of human families.
4. A mutation in a single gene always has only one discrete effect on an individual's phenotype.
1. TRUE
2. FALSE
3. TRUE
4. FALSE
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A bacterium is found that is resistant to the antibiotic gentamicin. The bacterium was isolated in a hospital where patients were routinely given gentamicin for a variety of infections. What was the pressure that selected for this resistant population?
A) presence of gentamicin in the environment B) high mutation rate for the bacterium C) growth situation for the bacterium D) patients that did not receive the antibiotic
Which of the labeled graphs above represents the age span of worker bees primarily occupied by
foraging?
a. A b. B c. C d. D e. E
Phenotypes can be positive, negative, or neutral in a population. A sharp contrast between balanced polymorphism and the three types of natural selection is that in balanced polymorphism
A. not only are multiple alleles persistent in a population, but all may be preserved. B. multiple alleles of a gene persist indefinitely in a population. C. many traits persist by only a single allele. D. polygenic traits in a population may mask the observation of extreme or intermediate phenotypes. E. all phenotypes may be preserved in a population.
Polyunsaturated fats
a. have fewer hydrogen atoms than do saturated fats. b. are more characteristic of animal fats than plant fats. c. have no double bonds. d. are solid at room temperature. e. are none of these