class genetics survey
TRANSCRIPT
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DQ 2-25-10
• What is genetics?
• What is a trait?
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Class Genetics Survey
• Problem: Are traits controlled by dominant alleles more common than traits controlled by recessive alleles?
• Page 92 in book
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Data Table
Total Number Students: ______
Trait 1 Number Trait 2 Number
A Free Ear lobes Attached Ear Lobes
B Hair on Fingers No Hair on fingers
C Widow’s Peak No widow’s peak
D Curly Hair Straight Hair (&wavy)
E Cleft Chin Smooth Chin
F Smile dimples No smile dimples
Period 7
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Class Trait Numbers
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Conclusion Questions
1. The traits listed under Trait 1 in the data table are controlled b dominant alleles. The traits listed under Trait 2 are controlled by recessive alleles. List the traits controlled by dominant alleles that were shown by a majority of students (more than half the class):
List the traits controlled by recessive alleles that were shown by a majority of students (more than half the class):
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http://www.ncrtec.org/tl/camp/gene/thumbs.htm
No hitchhiker’s thumb
Hitchhiker’s thumb
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Clinodactyly
(bent pinky finger)
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Data Table
Total Number Students: ______
Trait 1 Number Trait 2 Number
A Free Ear lobes Attached Ear Lobes
B Hair on Fingers No Hair on fingers
C Widow’s Peak No widow’s peak
D Curly Hair Straight Hair (&wavy)
E Cleft Chin Smooth Chin
F Smile dimples No smile dimples
Period 1
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Class Trait Numbers
![Page 13: Class Genetics Survey](https://reader038.vdocument.in/reader038/viewer/2022110120/557aa970d8b42a74488b4793/html5/thumbnails/13.jpg)
Data Table
Total Number Students: ______
Trait 1 Number Trait 2 Number
A Free Ear lobes Attached Ear Lobes
B Hair on Fingers No Hair on fingers
C Widow’s Peak No widow’s peak
D Curly Hair Straight Hair (&wavy)
E Cleft Chin Smooth Chin
F Smile dimples No smile dimples
Period 2
![Page 14: Class Genetics Survey](https://reader038.vdocument.in/reader038/viewer/2022110120/557aa970d8b42a74488b4793/html5/thumbnails/14.jpg)
Class Trait Numbers
![Page 15: Class Genetics Survey](https://reader038.vdocument.in/reader038/viewer/2022110120/557aa970d8b42a74488b4793/html5/thumbnails/15.jpg)
Data Table
Total Number Students: ______
Trait 1 Number Trait 2 Number
A Free Ear lobes Attached Ear Lobes
B Hair on Fingers No Hair on fingers
C Widow’s Peak No widow’s peak
D Curly Hair Straight Hair (&wavy)
E Cleft Chin Smooth Chin
F Smile dimples No smile dimples
Period 5
![Page 16: Class Genetics Survey](https://reader038.vdocument.in/reader038/viewer/2022110120/557aa970d8b42a74488b4793/html5/thumbnails/16.jpg)
Class Trait Numbers
![Page 17: Class Genetics Survey](https://reader038.vdocument.in/reader038/viewer/2022110120/557aa970d8b42a74488b4793/html5/thumbnails/17.jpg)
Data Table
Total Number Students: ______
Trait 1 Number Trait 2 Number
A Free Ear lobes Attached Ear Lobes
B Hair on Fingers No Hair on fingers
C Widow’s Peak No widow’s peak
D Curly Hair Straight Hair (&wavy)
E Cleft Chin Smooth Chin
F Smile dimples No smile dimples
Period 6
![Page 18: Class Genetics Survey](https://reader038.vdocument.in/reader038/viewer/2022110120/557aa970d8b42a74488b4793/html5/thumbnails/18.jpg)
Class Trait Numbers