Question

1. A newly-arisen neutral mutation will become fixed in a small population compared to a large population. a) faster b) slower c) it can never become fixed 2. The reason the area of the genome immediately surrounding an advantageous allele is in linkage disequilibrium. a) selective sweep b) founder effect c) genetic drift d ) selection coefficient 3. Flies A1 & A2 are genetic clones and B1 & B2 are a different set of clones. You raise Ay and By at low temperature and Az and B2 at high temperature. You find Al has a longer abdomen than A2 but B2 has longer abdomen than B1. This is due to a) additive genetic variance (VG) b) environmental variance (VE) c) VG+VĘ d) VGXVE 4. My mitochondria is from a lineage we can trace back to a woman that crossed the Bering Strait about 20,000 years ago. What phenomenon allows us to determine this? a) coalescence b) Quantitative Trait Loci (QTL) c) purifying selection d) selective sweep 5. Coral snakes are venomous, kingsnakes are not. Kingsnakes look like coral snakes where the two are sympatric due to a) Mullerian mimicry b) Batesian mimicry c) cryptic coloration d) none of these

Answer 1

1. The answer is it will be faster in a small population because the proportion of neutral mutations is expected to inversely vary with a taxon's effective population size. So neutral mutation is inversely proportional to population size.

2. The correct answer is genetic drift. Linkage disequilibrium is the non-random association of alleles at different loci in a given population.

3. The correct answer is both additive and environmental genetic variance.

4. The correct answer is coalescence. The coalescent theory is a model of how gene variants sampled from a population may have originated from a common ancestor.

5. The correct answer is Batesian mimicry. In this mimicry, an edible animal is protected by its resemblance to one avoided by predators.