Peter, a junior high school student, is color-blind. Why is Peter, a boy, more likely than a girl to be color-blind?
What will be an ideal response?
The ideal answer should include:
1. Color blindness is caused by a recessive allele on the X chromosome.
2. Boys have only one X chromosome, while girls have two.
3. Boys are more likely to be color-blind than girls because they only need inherit one allele on an X chromosome, whereas girls must inherit two recessive alleles.
4. The recessive allele on the X chromosome is expressed as color blindness in boys because there is no corresponding allele on the Y chromosome.
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The director of a preschool wants to set class size so that her school is a high-quality preschool with good outcomes for her students. She has a room of three-year-olds
What is the maximum number of students she should put in a room with one teacher? a. 25 b. 20 c. 15 d. 10
The low levels of awareness associated with strokes and other forms of brain damage are examples of
a. preconsciousness. b. altered states of consciousness. c. sensory gating. d. simulated states of consciousness.