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Unit 9 Heredity
Test Description: Review Heredity for 3rd Nine Weeks Exam
Instructions: Answer all questions to get your test result.
1) A mother and father both have AB blood types. What is the probability that their children will have blood type A?
A
75%
B
50%
C
25%
D
0%
2) When roan cattle are mated, 25% of the offspring are red, 50% are roan, and 25% are white. Upon examination, it can be seen that the coat of a roan cow consists of both red and white hairs. This trait is controlled by ______.
A
polygenic inheritance
B
multiple alleles
C
sex-linked genes
D
codominant alleles
3) The type of inheritance shown when a red-flowering plant is crossed with a white-flowering plant and pink-flowering plants are produced is _______.
A
inbreeding
B
codominance
C
incomplete dominance
D
polygenic inheritance
4) A heterozygous tall pea plant is crossed with a short plant. The probability that an offspring will be tall is
A
100%
B
75%
C
50%
D
25%
5) A man with type O blood is married to a woman with type AB blood. They have two natural children and one adopted child. Jada has type A blood, John has type O blood and Sally has type B blood. Which child is adopted?
A
John
B
Jada
C
Jada and John
D
Sally
6) If two heterozygous individuals are crossed, what percent of their offspring are also expected to be heterozygous?
A
75%
B
50%
C
100%
D
0%
7) Which genotype would express a dominant phenotype?
A
Tt
B
tt
C
bb
D
ss
8) B represents brown eyes and b represents blue eyes. What is the genotype of a homozygous blue eyed woman?
A
bB
B
BB
C
bb
D
Bb
9) What term do we use to describe the physical traits of an organism?
A
genotype
B
genetics
C
heredity
D
phenotype
10) Which of the following genotypes represent a heterozygous trait?
A
bb
B
Tt
C
tt
D
ss
*select an answer for all questions
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