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Heredity/ Incomplete Dominance 9
Test Description: This game aims to review different important definitions used in the heedity course for Grade 9 students.
Instructions: Answer all questions to get your test result.
1) A gene is :
A
The whole chromosome
B
A portion of a chromosome
C
All choices are correct
D
Present outside the nucleus
2) Self cross is a cross between :
A
F1 cross F1
B
Two birecessive
C
Made to determine the unknown genotype of the dominant allele.
D
F1 cross birecessive
3) A cross between white flower(pure) and red flower(pure) gives 100% pink flowers (F1) :
A
This is the case of Incomplete dominance
B
This is the case of Complete dominancy
C
Black allele dominates the white one
D
White allele dominates the black
4) In case of Incomplete dominance:
A
The dominant allele masks the recessive one
B
The recessive allele masks the dominant one
C
Both alleles are recessive.
D
An intermediate phenotype may appear in F1 .
5) A cross between yellow flower (pure) and blue flower (pure) gives 100% F1 (flowers of violet color):
A
All choices are correct
B
B: is the symbol of blue flower allele
C
This is the case of incomplete dominance
D
Y: is the symbol of white flower allele
6) A cross between a white mouse (pure) with a black mouse gives 100%grey mouses. The symbols that may be used are:
A
Non of the choices
B
W : white b: black
C
W: white B:black
D
w: white B: black
7) Hybrid genotype (meaning/examples):
A
AB
B
BR
C
Heterozygous
D
All choices are correct
8) A cross between pure red flower and a pink(RW) flower gives: (Incomplete dominance case)
A
Non of the choices is correct
B
50 % red and 50% pink
C
100% pure red
D
50% red and 50% white
9) A cross between two pink flowers (RW) gives: ( Incomplete dominance case)
A
50% pink flowers, 25% red flowers , 25% white flowers
B
100% red flowers
C
50% white and 50% red flowers
D
100% white flowers
10) A cross between two white flowers (pure) gives:
A
100 F1% of pure genotype
B
100% F1 with hybrid genotype
C
50% pure and 50% hybrid F1
D
Non of the choices is correct
*select an answer for all questions
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