3)                          Which population is in Hardy-Weinberg equilibrium

a.       A

b.      B

c.       C

d.      D

e.       E

4)                          Which population most likely has assortative mating?

a.       A

b.      B

c.       C

d.      D

e.       E

5)                          Which is not an assumption of Hardy-Weinberg equilibrium

a.       Mating is random

b.      No natural selection

c.       No migration

d.      No mutation

e.       Generations are discrete and non-overlapping

6)                          A violation of which assumptions will result in a change in the allele frequency?

a.       Mating is random

b.      No natural selection

c.       No migration

d.      No mutation

e.       Generations are discrete and non-overlapping

7)                          Above are bacteria with different genotypes in the lac operon. In which will beta-galactasidase activity always be absent?

a.       A

b.      B

c.       C

d.      D

e.       E

8)                          Above are bacteria with different genotypes in the lac operon. In which will beta-galactasidase activity be constitutive?

a.       A

b.      B

c.       C

d.      D

e.       E

9)                          In eukaryotes, if a gene is being actively transcribed, which statements are probably true

a.       The histones are methylated

b.      The histones are acetylated

c.       The promoter of the gene is in heterochromatin.

d.      The DNA is methylated

e.       The DNA is acetylated

10)                      Which of the following statements about RNAi are true?

a.       RNAi plays a protective role in response to viral infection

b.      Small regulatory RNAs can bind to mRNA targets by complementary base pairing

c.       This can lead to destruction of the target mRNA or can block its translation

d.      Some regulatory RNAs enter the nucleus and bind DNA to block transcription of the target gene

e.       RNAi protects genomes against mutational effects of transposable genetic elements.

11)                      Which classes of genes control the patterning of the embryo along the anterior-posterior axis?

a.       Maternal affect genes

b.      Segment polarity genes

c.       Homeobox genes

d.      Gap genes

e.       Pair-rule genes

12)                      Which class of genes are the first to be transcribed in the zygote?

a.       Maternal affect genes

b.      Segment polarity genes

c.       Homeobox genes

d.      Gap genes

e.       Pair-rule genes

13)                      Which classes of genes are exclusively transcription factors?

a.       Maternal affect genes

b.      Segment polarity genes

c.       Homeobox genes

d.      Gap genes

e.       Pair-rule genes