5. During which of the following stages of cell cycle DNA replication occurs? A) early prophase B) G1 phase
C) G2 phase
D) G0 phase
E) S phase

6. Which of the following statements best describes mitosis?
A) It occurs only in the reproductive structure of organism.
B) During this stage DNA is synthesized.
C) It is one of the interphase stages.
D) It is the division of mother cell into two daughter cells, genetically identical to each other and to their parent cell.
E) It is the division of mother cell into two daughter cells, genetically different from each other and from their parent cell.

7. Gene expression may be regulated:
A) only during translation
B) only during transcription
C) during transcription and translation
D) only during replication
E) during replication and transcription

8. During anaphase of meiosis I toward opposing poles of cell are pulled:
A) whole chromosomes
B) sister chromatids
C) bivalents
D) fragments of sister chromatids
E) tetrads

9. One of a series of different versions of gene is called:
A) genome
B) haploid
C) diploid
D) allele
E) allosome

10. Which of the following genotypes would produce the smallest number of different gametes if the alleles are assorted independently?
A) aa BB Dd
B) AA BB DD
C) Aa Bb DD
D) Aa BB DD
E) Aa Bb Dd

11. Which of the following processes can decrease the genetic variation in natural populations?
A) recombination
B) immigration
C) mutagenesis
D) inbreeding
E) hybridization