Link to video: https://youtu.be/uM4LxBG74ag After viewing part 2 of Dr. Hoekstra
ID: 192350 • Letter: L
Question
Link to video:
https://youtu.be/uM4LxBG74ag
After viewing part 2 of Dr. Hoekstra's video, answer the following questions: 1. What was the level of predation in non-cryptic mice? 2. The agents of predation were what kinds of animals? 3. After mating beach mice and mainland mice, what were the coloration characteristics of the F, generation? 4. In the early experiments, after sequencing the mouse genome they found three regions which seemed candidates to control color patterns. Which gene appears to be the most common and important in the change in color patterns? 5. One amino acid substitution results in reduced receptor activity and produces the light colored phenotype in beach mice. What is the amino acid substitution? 6. Light coloration has evolved independently in Gulf Coast population as compared to the Atlantic Coast population. This is an example of the phenomenon of:
Explanation / Answer
1.The level of predation in non cryptic mice is more than the cryptic mice.The level of predation in non cryptic mice is twice that of cryptic mice.
2.The agents of predation were half of them were avian predators and half of them were mammalian predators like coyotes and foxes.
3.F2 generation has a color characteristics of both the light parent and dark parent with color variation in each of the offsprings.In each offspring, color is contributed by both light parent or by dark parent but the amount varies.
4.Mc1r gene appears to be the most common and important in the change in color patterns.
5.In mainland mice,the Mc1r receptor had aminoacid Arginine at position 65 while in beach mice,the Mc1r receptor had aminoacid Cysteine at position 65.Arg 65 in mainland mice is substituted to Cys65 in beach mice.
6.This is an example of phenomenon known as Convergent evolution
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