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Activity 59 Follow Up

Activity 59 Follow Up. Why did you toss a coin to model gene behavior?. There is a 50-50 chance of the parent passing a blue vs. an orange allele to the offspring. Simulates a random process for determining which allele each parent gives to offspring.

brett-nolan
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Activity 59 Follow Up

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  1. Activity 59 Follow Up Why did you toss a coin to model gene behavior? • There is a 50-50 chance of the parent passing a blue vs. an orange allele to the offspring. • Simulates a random process for determining which allele each parent gives to offspring.

  2. Activity 59 Analysis Questions pages 32-33 • Ratio of tail colors = # blue-tailed offspring • # orange-tailed offspring 1. What is the ratio of blue-tailed to orange-tailed critter pups? • Express it as a ratio using a whole number: • __?__: 1

  3. C. Use in a sentence. About __?__ of the offspring have blue tails, and about __?__ of the offspring have orange tails. • ¾ blue and ¼ orange D. Explain why the class obtained such a large ratio. For example, why isn’t the ratio of blue to orange tails 1:1, that is ½ blue and ½ orange? • Blue tails are much more likely because 3 coin toss combinations yield a blue tail, and only 1 gives orange. Blue is dominant.

  4. 2. You and your partner are about to toss 2 coins 100 times. Predict about how many times the outcome would be: • heads-heads 25 times or 1/4 • heads-tails 25 times or 1/4 • tails-heads 25 times or 1/4 • tails-tails 25 times or 1/4

  5. 3. How sure are you that you will get the results you predicted for Question 2? Explain. You cannot be sure. The results are based on probability and are the most likely results. Probability allows us to predict how likely each result is, but not the actual sets of results obtained.

  6. 5. Write your own definition to the phrase dominant trait as it is used in genetics. Does it mean that every time any pair of critters mates, most of the offspring will have blue tails? Why or why not? • Dominant trait: you can always observe if at least 1 allele for that trait is present. • No, if both parents have orange tails, then all their offspring will have orange tails.

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