What is the probability of an offspring from the model 2 population getting a recessive allele?

15. if p is used to represent the frequency of the dominant allele and q is used to represent the fre-quency of the recessive allele, then what will p + q equal? 16. use your knowledge of statistics to calculate the probability of an offspring from the model 2 population having each of these genotypes. support your answers with mathematical equations. (don’t forget there are two ways to get a heterozygous offspring—bb or bb.) bb bb bb 17.

How do your answers support the conclusion that the population is not in hardy-weinberg equilibrium?

The hardy-weinberg equation 7extension questions25. the ability to taste ptc is due to a single dominant allele “t.” you sampled 215 individuals and determined that 150 could detect the bitter taste of ptc and 65 could not. calculate the follow-ing frequencies.a. the frequency of the recessive allele. b. the frequency of the dominant allele. c. the frequency of the heterozygous individuals. 26. sixty flowering plants are planted in a flowerbed.

The Hardy Weinberg Equation Pogil

Q: Can we make predictions about the characteristics of a population?

Why?punnett squares provide an easy way to predict the possible genotypes for an offspring, but it is not practi-cal to perform a punnett square analysis on all possible combinations of all members of a population to predict what the population might look like in the future. for that we must turn to statistics. the hardy-weinberg equation is a tool biologists use to make predictions about a population and to show whether or not evolution is occurring in that population.

Q: How many mating pairs are illustrated in model 1?

2. describe the parents in each mating pair in model 1. use terms such as homozygous, heterozy-gous, dominant, and recessive. 3. use two punnett squares to determine the possible genotypes for offspring from the pairs. 2 pogil™ activities for ap* biology 4. if each mating pair has one offspring, predict

Q: How many of the first generation offspring will have the following genotypes. bb bb bb 5. imagine the 24 beetles in model 1 as a population in an aquarium tank.a. how likely is the pairing scenario in model 1 to take place during the natural course of things within that tank?

B. why is model 1 labeled “selective mating”? 6. list two other pairings that might occur in the population in model 1 if the beetles were allowed to mate naturally. 7. if the population of beetles in model 1 mated naturally would your prediction for the offspring in question 4 still be valid? explain. 8. discuss in your group the limitations of punnett square predictions when it comes to large popu-lations. summarize the key points of your discussion here.

The Hardy-Weinberg Equation 1

The Hardy-Weinberg Equation

How can we make predictions about the characteristics of a population?

Why?

Punnett squares provide an easy way to predict the possible genotypes for an offspring, but it is not practi-

cal to perform a Punnett square analysis on all possible combinations of all members of a population to

predict what the population might look like in the future. For that we must turn to statistics. The Hardy-

Weinberg equation is a tool biologists use to make predictions about a population and to show whether or

not evolution is occurring in that population.

Model 1 – Controlled (Selective) Mating

Males Females

1. How many mating pairs are illustrated in Model 1?

2. Describe the parents in each mating pair in Model 1. Use terms such as homozygous, heterozy-

gous, dominant, and recessive.

3. Use two Punnett squares to determine the possible genotypes for offspring from the pairs.

2 POGIL

™

Activities for AP* Biology

4. If each mating pair has one offspring, predict how many of the first generation offspring will

have the following genotypes.

BB Bb bb

5. Imagine the 24 beetles in Model 1 as a population in an aquarium tank.

a. How likely is the pairing scenario in Model 1 to take place during the natural course of things

within that tank?

b. Why is Model 1 labeled “Selective Mating”?

6. List two other pairings that might occur in the population in Model 1 if the beetles were allowed

to mate naturally.

7. If the population of beetles in Model 1 mated naturally would your prediction for the offspring

in Question 4 still be valid? Explain.

8. Discuss in your group the limitations of Punnett square predictions when it comes to large popu-

lations. Summarize the key points of your discussion here.

The Hardy-Weinberg Equation 3

Model 2 – Population Genetics

Bb bb

Bb Bb

BbBb

Bb bb

bb bb

Bb bb

Bb Bb

BbBb

Bb bb

bb bb

Males Females

9. Compare the organisms in the population in Model 1 with the organisms in the population in

Model 2.

10. Individually match up twelve mating pairs from the population in Model 2 that might occur in a

natural, random mating situation.

11. Compare your set of mating pairs with other members of your group. Did your mating scheme

match anyone else’s in the group?