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Final Exam 2014
Test Description: Final review
Instructions: Answer all questions to get your test result.
1) In pea plants, teh gene for tallness (T) is dominant over the gene for shortness(t). If 100% of the F1 generation oppspring are heterozygous tall, what were the possible genotypes of the parents?
A
TT x Tt
B
Tt x tt
C
Tt x Tt
D
TT x tt
2) A person with type O blood married a person with type AB blood. Possible blood genotypes of their children are
A
AO and BB
B
AB and OO
C
BB and AA
D
AO and BO
3) The chances of a YY chromosome combination occurring in humas as a result of normal meiotic division is
A
50%
B
25%
C
100%
D
0%
4) In humans, a characteristic of a recessive, sex-linked trait such as hemophilia is that it
A
is carried on the Y chromosome
B
appears most often in femals
C
never appears in females
D
is carried on the X chromosome
5) If a man has type B blood and his sister has type A blood, which combination represents the genotypes of their parents?
A
type O father and a homozygous B mother
B
both mother and father have type O blood
C
type O father and a homozygous A mother
D
type AB father and type O mother
6) According to Darwin's theory of natural selection, the individuals that tend to survive are those that have
A
characteristics their parents acquired by use and disuse
B
the smallest number of offspring
C
variations best suited to the environment
D
undergone mutation
7) Which individuals woudl have the most similar DNA sequences?
A
Mr. O'Hanlon and Mr. Abramovic
B
identical twins
C
two cousins
D
a brother and a sister
8) Color blindness is a sex-linked trait carried on the X-chromosome. If a boy is born color-blind, what would have to be true?
A
His grandfather passed on the color-blind trait to his father
B
His father had normal vision
C
His grandmother was color-blind
D
His mother carried at least one gene for colorblindness
9) Why don't all children have the same eye color?
A
Eye color is determined by one parent only
B
Eye color is determined by a combination of both parents
C
Eye color is determined by the sex of the child
D
Eye color is completely random in humans
10) In cats, the gene for short hair (A) is dominant over the gene for long hair (a). A short-haired male cat is mated with a long-haired female, and four kittens are produced, two short haired and two longhaired. What are the genotypes of the parents?
A
Aa x aa
B
AA x aa
C
Aa x Aa
D
AA x Aa
*select an answer for all questions
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