Which of the following statements best represents the theory of pangenesis developed by Hippocrates?
A) Pregnancy is a spontaneous event, and the characteristics of the offspring are determined by the gods.
B) 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.
C) Offspring inherit the traits of either the mother or the father, but not both.
D) Heritable traits are influenced by the environment and the behaviors of the parents.
Answer: B
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Overexpression of ________ lead to the development of cancer in mice, and variations in their structure or amounts have been documented in various types of cancer cells.
Fill in the blank(s) with the appropriate word(s).
What happens immediately after a signaling molecule binds to an RTK?
a. receptor dimerization b. receptor trimerization c. receptor denaturation d. receptor polymerization e. receptor hydrolysis
All of the following can be true of cloning vectors
EXCEPT that they a. are plasmids that slip into a host cell. b. are plasmids that accept foreign DNA. c. can be engineered to contain multiple cloning sites. d. are portions of the main bacterial chromosome. e. can be viruses.
During a human pregnancy, implantation occurs at which stage?
a. zygote b. early cleavage c. blastocyst d. gastrula e. morula