The Human Genome Project was started in 1986 to
a. identify the nucleotide sequences of all human
genes.
b. develop a complete DNA library for a human
gene.
c. develop genetic markers for all genetic diseases.
d. catalog all the varieties of human alleles.
e. identify all humans that possess genetic defects.
Answer: a
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Which of the following products can be found in maternal milk? a. Toxins b. Antibodies c. Alcohol d. All of these choices
e. Drugs
Which of the following best describes the presence of gill structures in vertebrate embryos and tail structures in embryos in the great apes?
a. These are vestigial structures that are residual parts from a past common ancestor. b. These structures continue to be necessary for survival in the adult form of these organisms. c. These structures show that these species have been isolated since the separation of the supercontinent Gondwana. d. Vertebrate organisms are more closely related to fish than to marsupials.
Mutations can create new alleles that
A. are beneficial to the organism's fitness. B. have no effect on the fitness of the organism. C. decrease the fitness of the organism. D. All of the choices are correct.
What is the structure labeled as 1 in the accompanying figure?
a. heterospore
b. homospore
c. embryo
d. gamete
e. zygote