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,Genetics Exam 1.pdf Genetics Exam 1.pdf Genetics Exam 1
The dominant trait, Huntington disease causes severe neural/brain damage at approximately
age 40. A female whose mother has Huntington disease marries a male whose parents are
normal. It is not known if the female has the disease. What is the probability that their firstborn
will inherit the gene that causes Huntington disease?
1) 25%
2) 50%
3)75%
4)100%
5)0%
25%
The following symbols ~ = ± indicate a consanguineous mating. True or False
True
Genetics Exam 1.pdf Genetics Exam 1.pdf Genetics Exam 1.pdf
,Genetics Exam 1.pdf Genetics Exam 1.pdf Genetics Exam 1
A rare recessive trait in a pedigree is indicated by which pattern of inheritance?
1)vertical
2)horizontal
3)diagonal
4)both vertical and horizontal
5)None of these is correct.
horizontal
Genetics Exam 1.pdf Genetics Exam 1.pdf Genetics Exam 1.pdf
, Genetics Exam 1.pdf Genetics Exam 1.pdf Genetics Exam 1
An alternative form of a single gene is known as
1)parental.
2)dihybrid.
3)reciprocal.
4)allele.
5)recessive.
allele
Genetics Exam 1.pdf Genetics Exam 1.pdf Genetics Exam 1.pdf