1) Linkage means
• A) Alleles at different loci are independent
• B) Alleles at different loci are physically close
to each other and on the same chromosome
• C) Alternate alleles at the same locus are not
independent
• D) Alleles at different loci are not independent
• E) Alternate alleles are fixed at alternate loci
2) independence, i.e. an absence of
linkage disequilibrium
• A) is caused by recombination over time
• B) is likely for genes found within
chromosome inversions
• C) is a basic mendelian law that is not violated
• D) means that traits do not evolve
independently of each other
• E) none of the above
3) If allele S at one locus has a frequency of 0.5
and allele t at a different locus has a frequency
of 0.4, what is the expected frequency of the St
haplotype if the loci are in equilibrium?
•
•
•
•
•
A) 0.54
B) 0.9
C) 0.2
D) 0.4
E) can not be determined from these data
4) What does sex do
• A) recombines alleles at different loci thereby
producing high levels of genotypic variation
• B) decreases linkage disequilibrium
• C) helps populations of organisms track
changing environmental conditions
• D) all of the above
5) Muller’s ratchet
• A) is likely to be very important in large
populations
• B) is unlikely to be very important in large
populations
• C) reverses linkage
• D) slows down evolution
• E) eliminates deleterious alleles