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8th Grade-Genetics
Test Description: Answer these questions on genetics to help you prepare for your rest.
Instructions: Answer all questions to get your test result.
1) Which of the following is heterozygous?
A
YY
B
Bb
C
HH
D
nn
2) Which of the following is homozygous?
A
Tt
B
Hh
C
Yy
D
BB
3) Which best describes co-dominance?
A
a blend of traits show
B
only the recessive trait shows
C
only the dominant trait shows
D
both traits will show
4) Which best describes incomplete dominance?
A
only the recessive trait shows
B
only the dominant trait shows
C
both traits will show
D
a blend of traits show
5) Who is known as the father of genetics?
A
George Washington
B
Gregor Mendel
C
Thomas Jefferson
D
Reginald Punnett
6) If R represents round seeds and r represents oval seeds, which of the following will have oval seeds?
A
RR
B
rr
C
Rr
D
rR
7) If R represents round seeds and r represents oval seeds, what would be the genotype of a male heterozygous round breeding with a female homozygous round?
A
RR x rr
B
rr x rr
C
RR x Rr
D
Rr x Rr
8) When a dominant gene is present which is true?
A
The dominant phenotype will show.
B
Neither dominant nor recessive will show.
C
The recessive phenotype will show
D
The recessive phenotype will mask the dominant.
9) Which of the following is an example of phenotype?
A
bb
B
Bb
C
Brown eyes
D
BB
10) Which of the following is a genotype?
A
Bb
B
Brown Eyes
C
Curly Hair
D
Brown Hair
*select an answer for all questions
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