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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
bb
C
ABc
D
BB
2) The passing of traits from one generation to the next is ____.
A
Botany
B
Phenotype
C
Genotype
D
Heredity
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
XY
C
XX
D
GG
5) A _______________ is a chart or family tree that tracks which members of a family have a particular trait.
A
family tree
B
punnet square
C
Karyotype
D
pedigree
6) The scientific study of heredity is called
A
genetics
B
biology
C
homogamy
D
biochemistry
7) The trait that is hidden by the presence of an overpowering trait is:
A
powerful
B
recessive
C
dominant
D
weak
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 square
B
unshaded circle
C
unshaded square
D
shaded circle
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
50%
B
100%
C
25%
D
0%
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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