Genetics & The Red Haired Italians of New York
Biology 6th Period


March 3rd, 2000


Purpose:


1. To discover how brown hair, brown eye Italians can have red hair, hazel eye babies.


2. To compare and contrast Punnett Square data to class/actual data.


Hypothesis:


N/A


Materials & Procedure:


(Same as Handout)


Data:


Punnett Square Data:


B b


B


BB


Bb


b


bb


bb


BB= 25%


Bb= 50%


bb= 25%


Class/Actual Data:


BB


Bb


bb


3, 3, 7, 4, 1, 4, 2, 3, 4, 4, 4, 5


Total=44


5, 6, 3, 5, 9, 4, 6, 7, 4, 5, 3, 5


Total=62


4, 3, 2, 2, 2, 4, 4, 2, 4, 3, 5, 3


Total=38


BB= 30.6%


Bb= 43%


bb= 26.4%


Percent Errors:


BB= 22.4%


Bb= 14%


bb= 5.6%


Punnett Square Percentages:


Bh Bh bH bh


BH


BBHH


BBHh


BbHH


BbHh


Bh


BBHb


BBhh


BbHh


Bbhh


bH


BbHH


BBHh


BbHH


BbHh


bh


BbHb


Bbhh


BbHh


Bbhh


BBHH= 6.25%


BBHh= 12.5%


BBhh= 6.25%


BbHH= 12.5%


BbHh= 25%


Bbhh= 12.5%


bbHH= 6.25%


bbHh= 12%


bbhh= 6.25%


Class/Actual Percentages:


BBHH


BBHh


BBhh


BbHH


BbHh


Bbhh


bbHH


bbHh


bbhh


1,2,3,1,2,2,2,3


Total=


16


2,2,3, 1,2,2, 1,2,1


Total=


16


1,3,1, 2,1,1,3


Total=


12


2,1,1, 1,2,1, 1,1


Total=


10


5,4,4, 1,1,1,3


Total=


19


1,1,1, 2,2,2, 1,1,1


Total=


12


1,2,3, 3,2


Total=


11


1,4,1,2, 3,1,1,2,1


Total=


16


1,2,1, 1,1


Total=


6


Pheno-type:


Brown Hair brown eyes


Brown Hair brown eyes


Brown Hair hazel eyes


Brown Hair brown eyes


Brown Hair brown eyes


Brown Hair Hazel eyes


Brown Hair brown eyes


Red Hair brown eyes


Red Hair hazel eyes


BBHH= 13.6%


BBHh= 13.6%


BBhh= 10.2%


BbHH= 8.5%


BbHh= 16.1%


Bbhh= 10.2%


bbHH= 9.3%


bbHh= 13.6%


bbhh= 5.1%


Percent Errors:


BBHH= 117.6%


BBHh= 8.8%


BBhh= 63.2%


BbHH= 32%


BbHh= 35.6%


Bbhh= 18.4%


bbHH= 48.8%


bbHh= 13.3%


bbhh= 18.4%


Post Lab Questions:



o Brown hair brown eye babies: 61
o Brown hair hazel eye babies: 24
o Red hair brown eye babies: 27
o Red hair hazel eye babies: 6
Conclusion:


The data was not accurate because we have done a experiment through reality and a set group of numbers may be likely to come up a number of times (possibility in idealism), but not always (reality in optimism).


If a better result is being closer to the Punnett Square’s value, then ways to improve results include having more people do this experiment and increasing the number of probability by increasing the number of individual M&M® selection.


This lab was relatively simple, yet it produced a fun and educational environment. Possible errors consist of wrong M&M® selection, wrong amount of tries of selection, calculation problems, wrong readings, class data not collected properly because of group participation, and individual inaccurate information, and false supply of data.