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, occurring 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. Co - dominance is the equal expression of two dominant alleles.
• 52. For genotype RrBB, using the law of independent assortment, the possible gametes are RB and rB, so 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 - fiber formation in mitosis.
• 55. Sperm and eggs are reproductive cells, also known as gametes.

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