Make The Right Call! Lab

Problem (Guiding Question) : How can you predict the possible results of genetic crosses?

Hypothesis: I guess you can make an educated guess.

Data Table

Number: 1

Trial	Allele from bag 1 (female parent)	Allele from bag 2 (male parent)	Offspring’s Alleles (genotype)
1	B	b	Bb
2	B	b	Bb
3	B	b	Bb
4	B	b	Bb
5	B	b	Bb
6	B	b	Bb
7	B	b	Bb
8	B	b	Bb
9	B	b	Bb
10	B	b	Bb

Number: 2

Trial	Allele from bag 1 (female parent)	Allele from bag 2 (male parent)	Offspring’s Alleles (genotype)
1	B	b	Bb
2	B	b	Bb
3	B	B	BB
4	B	B	BB
5	B	B	BB
6	B	B	BB
7	B	b	Bb
8	B	b	Bb
9	B	b	Bb
10	B	B	BB

Number: 3

Trial	Allele from bag 1 (female parent)	Allele from bag 2 (male parent)	Offspring’s Alleles (genotype)
1	b	b	bb
2	B	b	Bb
3	b	b	bb
4	b	B	Bb
5	b	b	bb
6	b	b	bb
7	B	B	BB
8	B	b	Bb
9	B	B	BB
10	b	b	bb

Analyze & Conclude

1. Making Models 

	b	b
B	Bb	Bb
B	Bb	Bb

	B	b
B	BB	Bb
B	BB	Bb

	B	b
B	BB	Bb
b	Bb	bb

2. Interpreting Data

Only 1 offspring is possible. They are both purebred, There was two blue in bag 1 and two white in Bag 2. The results in the punnet square are correct because each square has the same.

3. Predicting

There are two different kinds which are BB and Bb. Both of them have a 50 % chance. Both are in two squares in the punnet square.

4. Making Models

There are three different kinds of offspring's in my Punnet Square. BB has a chance of 25 %, Bb has a chance of 50 % and bb has a chance of 25 % like BB. The model agrees with the punnet square because Bb has two squares and BB and bb has only one. 

5. Inferring

If I did 100 trials instead of 10 trials there wouldn't be a really accurate answer, but I think that the result would be closer to 50 % for each one. This would prove it much more than doing only 10 trials. This is because we would have more chance to equal it with more tries. 

6. Communicating

The two methods are quite similar in a sense that both of them can be used to predict the probability of the offspring inheriting certain traits from their parents. However, they do have a major difference. The Punnet Square is being used to predict the possible outcomes of a genotype, the marble model is a test for the Punnet Square.