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Bio Chapter 9

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Which of the following statements best represents the theory of pangenesis developed by Hippocrates?
A. Particles called pangenes, which originate in each part of an organism's body, collect in the sperm or eggs and are passed on to the next generation.
B. Pregnancy is a spontaneous event, and the characteristics of the offspring are determined by the gods.
C. Heritable traits are influenced by the environment and the behaviors of the parents.
D. Offspring inherit the traits of either the mother or the father, but not both.
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Which of the following statements best represents the theory of pangenesis developed by Hippocrates?
A. Particles called pangenes, which originate in each part of an organism's body, collect in the sperm or eggs and are passed on to the next generation.
B. Pregnancy is a spontaneous event, and the characteristics of the offspring are determined by the gods.
C. Heritable traits are influenced by the environment and the behaviors of the parents.
D. Offspring inherit the traits of either the mother or the father, but not both.
A
Which of the following statements regarding hypotheses about inheritance is false?
A. The theory of pangenesis incorrectly suggests that reproductive cells receive particles from somatic cells.
B. The blending hypothesis suggests that all of the traits of the offspring come from either the mother or the father.
C. Contrary to the theory of pangenesis, somatic cells do not influence eggs or sperm.
D. The blending hypothesis does not explain how traits that disappear in one generation can reappear in later generations.
B
Amniocentesis and chorionic villus sampling allow for ________ and ________ of the fetus so that it can be tested for abnormalities.
A. direct observation; biochemical testing
B. imaging; karyotyping
C. karyotyping; biochemical testing
D. sexing; imaging
C
Which of the following statements regarding prenatal testing is false?
A. Results from chorionic villus sampling come faster than those from amniocentesis.
B. Chorionic villus sampling is typically performed later in the pregnancy than amniocentesis.
C. Ultrasound imaging has no known risk.
D. Chorionic villus sampling and amniocentesis are usually reserved for pregnancies with higher than usual risks of complications.
B
Which of the following statements regarding genetic testing is false?
A. Carrier testing helps determine whether a person carries a potentially harmful disorder.
B. Most human genetic diseases are treatable if caught early.
C. Genetic testing before birth requires the collection of fetal cells.
D. The screening of newborns can catch inherited disorders right after birth.
B