Exam4_A_Key - True/False 2 points each 1 The mismatch...

True/False, 2 points each
1. The mismatch repair mechanism of mispaired nucleotides is the rarest type of repair system.
False
2. Transposable elements are RNA sequences that are able to move their location from the
nucleus to the cytoplasm of cells.
False
3. Mutations outside of the coding region can have no detectable phenotypic effect
True
4. Favorable mutations arise because the organism has a need for it.
False
5. CG sites in mammals are known to be hot spots of DNA mutation
True
6. Mutational hot spots occur because methylated cytosines are not highly mutable
False
7. The volume of the egg cell is about 5000 times the volume of the sperm head and contributes
virtually all of the cytoplasm to the zygote, including the mitochondria.
True
8. Conjugation in cilliates involves the exchange of micronuclei.
True
9. Cytoplasmic male sterility is named as such because it is a trait that is genetically transmitted
through the male parent.
False
10. If a population is in Hardy-Weinberg equilibrium, allele frequencies will change through
transmission under random mating.

False
11. One implication of the Hardy-Weinberg principle is that the great majority of rare, harmful
recessive alleles are present in heterozygous carriers.
True
12. Mutation and migration both introduce new alleles into populations.
True
13. Natural selection can change allele frequency in a systematic direction because of the
differential reproductive success of certain genotypes.
True
14. Random genetic drift consists of random changes in allele frequency that occur in finite
populations as a result of chance excess reproduction among certain genotypes.
True
15. In a finite population, an allele is less likely to be lost than it is to go to fixation.