14 homologous genes encoding globins (hemoglobin, myoglobin) in the human genome were originally derived from a single ancestor that duplicated 500-600 million years ago. Which term most adequately describes the relationship between these genes?
A. sister chromatids
B. gene family
C. gene cluster
D. moderately repetitive sequences
E. highly repetitive sequences
B. gene family
You might also like to view...
Answer the following statements true (T) or false (F)
1. Homologous chromosomes are identical copies of each other. 2. Mitotic cell division is never used by organisms as a means of reproduction. 3. A diploid queen honeybee produce eggs by meiosis. Some of these eggs are never fertilized, while the rest are. These unfertilized eggs develop into haploid male honeybee. This can be an example of sexual reproduction. 4. For any given species, cells in metaphase II of meiosis would contain 2? more genetic material than cells in metaphase of mitosis. 5. The karyotype of a normal human male would show a total of 23 pairs of homologous chromosomes.
Nitrogen-fixing bacteria, in the roots of soybeans, help provide a source of nitrogen to the plants. In exchange, the bacteria obtain food from the plants. The bacteria are converting
A. ammonium (NH4) to nitrate (NO3). B. nitrate (NO3) to ammonium (NH4). C. nitrogen gas (N2) to nitrate (NO3). D. nitrogen gas (N2) to ammonium (NH4). E. nitrate (NO3) to nitrogen gas (N2).
The structure indicated by the letter “C” above
represents a. actin. b. myofibril. c. myosin. d. myofilament. e. muscle fiber.
Clostridium botulinum is made virulent by incorporated prophage genes encoding the botulinum toxin. What term describes this process?
A. adsorption B. budding C. lysogenic conversion D. latent phase E. lytic phase