Question

true/false: read each of the following questions carefully and indicate whether they are true \a\ or false \b\. (2.5 points each)

1. ultraviolet radiation is a possible mutagen.
2. cytokinesis is the division of the cytoplasm and occurs after telophase.
3. all protein synthesis begins with the codon aug.
4. the genetic makeup of an individual is called their genotype.
5. co - dominance is when 2 dominant alleles are expressed equally.
6. someone who had a genotype of rrbb could make 4 different types of gametes
7. homozygous means the alleles for a particular trait are identical.
8. plant cells use centrioles in mitosis
9. sperm and eggs are gametes

Explanation:

• 47. Ultraviolet radiation can cause DNA damage and mutations, so it is a mutagen.
• 48. Cytokinesis is the final step of cell - division where the cytoplasm divides after telophase.
• 49. AUG is the start codon for protein synthesis in most cases.
• 50. Genotype refers to the genetic makeup of an individual.
• 51. In co - dominance, two dominant alleles are both fully expressed.
• 52. For RrBB, the possible gametes are RB and rB, 2 types not 4.
• 53. Homozygous means having identical alleles for a trait.
• 54. Plant cells do not have centrioles and use other structures for spindle - formation in mitosis.
• 55. Sperm and eggs are the male and female gametes respectively.

Answer:

1. A. True
2. A. True
3. A. True
4. A. True
5. A. True
6. B. False
7. A. True
8. B. False
9. A. True