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Genetics 7th Grade Review By Moore
Test Description: 7th grade genetics review
Instructions: Answer all questions to get your test result.
1) Which alleles indicate an organism that is hybrid for a trait?
A
bb
B
ABc
C
BB
D
Bb
2) The passing of traits from one generation to the next is ____.
A
Heredity
B
Phenotype
C
Botany
D
Genotype
3) How many pairs of chromosomes do humans have?
A
22
B
23
C
48
D
46
4) If a human is a girl, her sex chromosomes are:
A
Gg
B
XX
C
GG
D
XY
5) A _______________ is a chart or family tree that tracks which members of a family have a particular trait.
A
pedigree
B
punnet square
C
Karyotype
D
family tree
6) The scientific study of heredity is called
A
genetics
B
biology
C
biochemistry
D
homogamy
7) The trait that is hidden by the presence of an overpowering trait is:
A
weak
B
dominant
C
recessive
D
powerful
8) You and your colleagues are constructing a pedigree for a patient with cystic fibrosis. The individual's brother has also been diagnosed with cystic fibrosis. How would this brother be represented in the pedigree?
A
shaded circle
B
unshaded square
C
unshaded circle
D
shaded square
9) A man carrying the allele for Huntington's disease marries a woman who is homozygous recessive for the allele. What is the probability that their offspring will develop Huntington's disease?
A
100%
B
0%
C
50%
D
25%
10) An individual has type AB blood. His father has type A blood and his mother has type B blood. The individual's phenotype is an example of ____.
A
Co-dominance
B
simple recessive heredity
C
Heterozygous heredity
D
simple dominant heredity
*select an answer for all questions
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