Biology 110 – Survey of Biology
FINAL LAB EXAM
Session:
Section:
Class Location:
Days / Time:
Instructor:
Summer 2015
67163 4 Units
NVC 2231
MTWTh 12:20 PM – 4:20 PM
RIDDELL
GENETICS
O’Doherty
O’Sullivan
BBLL
bbcc
Black wool, Long Strands
White wool, Short Strands
Irish Sheepherders, O’Doherty and O’ Sullivan were close friends and neighbors. Each raised pure [true]
breeding sheep. Fences and grazing ranges were meticulously maintained. Characteristics of the breed
include Black vs white wool. And Long vs short stranded wool. Black wool was prized for making coats
and furniture and carpets. White wool was prized for making sweaters. In this manner, both ranchers did
not compete for the same markets and received maximum price for their wool.
Both shepherds were bachelors. Both suddenly died mysteriously on the same day.
By the time that other villagers noticed, both flocks had co-mingled.
In the following Spring, there were several new lambs, the F1 generation of the co-mingle. It appeared
that some were O’Doherty bred, some were O’Sullivan bred and many seemed to be all mixed up. It was
obvious to the descendant shepherds that a di-hybrid cross had taken place among the sheep. It was
also obvious that the genes were not completely dominant. O’Doherty and O’Sullivan were probably
aware of this fact and therefore had maintained close control over the mating habits of the original flocks.
Fill in the following tables and Charts of expected genotypes and phenotypes for the F1 generation.
See XL Spreadsheet FINAL LAB EXAM GENETICS.
Page 1 of 2
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Biology 110 – Survey of Biology
FINAL LAB EXAM
Session:
Section:
Class Location:
Days / Time:
Instructor:
Summer 2015
67163 4 Units
NVC 2231
MTWTh 12:20 PM – 4:20 PM
RIDDELL
Page 2 of 2
Document1