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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, |5, 6, 3, 5, 9, 4, 6, |4, 3, 2, 2, 2, 4, 4, |
|3, 4, 4, 4, 5|7, 4, 5, 3, 5|2, 4, 3, 5, 3|
||||
|Total=44 |Total=62 |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:
1. Brown hair brown eye babies: 61
2. Brown hair hazel eye babies: 24
3. Red hair brown eye babies: 27
4. 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.