Which of the following shows the greatest promise as a cancer chemotherapy agent?
A) a drug that interferes with organismal cellular respiration
B) a drug that prevents mitotic spindle from forming
C) a drug that prevents crossing over
D) a drug that prevents tetrad formation
Answer: B
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Mature fungal spores are ____
a. always haploid b. always diploid c. always dikaryotic d. either diploid or dikaryotic e. either haploid or diploid
During prophase I of meiosis
1.chromosomes condense. 2.chromosomes are aligned on the equator of the cell. 3.nuclear envelopes form in some species but not in others. 4.homologous chromosomes are separated. 5.DNA is replicated.
a gene is transferred naturally by a bacterium from a plant genome to an insect genome within the same
generation. What process does this illustrate? a. restriction b. genome shuffling c. genome switching d. vertical gene transfer e. horizontal gene transfer
Hemophilia is caused by an X-linked recessive gene. A normal woman whose father had hemophilia marries a normal man. What are the chances of hemophilia in their children?
A. All females would be normal. B. All females would be carriers. C. All males would have hemophilia. D. All females would have hemophilia. E. Half of the women would have hemophilia.