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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
bb
D
ABc
2) The passing of traits from one generation to the next is ____.
A
Botany
B
Phenotype
C
Heredity
D
Genotype
3) How many pairs of chromosomes do humans have?
A
48
B
46
C
23
D
22
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
punnet square
B
pedigree
C
family tree
D
Karyotype
6) The scientific study of heredity is called
A
homogamy
B
genetics
C
biochemistry
D
biology
7) The trait that is hidden by the presence of an overpowering trait is:
A
dominant
B
weak
C
powerful
D
recessive
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
unshaded circle
B
shaded square
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
100%
B
0%
C
25%
D
50%
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
simple dominant heredity
B
Co-dominance
C
simple recessive heredity
D
Heterozygous heredity
*select an answer for all questions
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