1. How many different phenotypes are possible in the offspring of two parents with genotypes AA and aa, where A is the dominant allele for a trait and a is the recessive allele for the same trait? one
two
three
four
2. A woman buys red-flowering and blue-flowering plants of the same species and plants them in her garden. The plant undergoes both self-fertilization and cross-fertilization. The woman collects seeds and plants them the following spring. What can the woman expect to observe in the flowers of the new generation of plants if the gene for flower color is codominant? (1 point)
plants with red flowers and plants with blue flowers
plants with both red and blue flowers
plants with red flowers, plants with blue flowers, and plants with purple flowers
plants with purple flowers
3. What is formed at the end of meiosis?
two genetically identical cells
four genetically different cells
four genetically identical cells
two genetically different cells
4. Which of the following is true concerning DNA replication?
The original DNA molecule remains intact, although it acts as a template for the formation of a copy that contains two new antiparallel strands.
The leading strand is copied in the 5’ to 3’ direction and the lagging strand is copied in the 3’ to 5’ direction.
Both strands are copied to form Okazaki fragments, which are later annealed by DNA ligase.
The replication process proceeds on both strands in the same direction, which requires that RNA primers bind to the lagging strand.
5. Which of the following will be directly affected in a bacterial cell that has a mutation in its gene for RNA polymerase?
Which of the following will be directly affected in a bacterial cell that has a mutation in its gene for RNA polymerase?
transcription
translation
gene regulation