Biology Game Heredity G9 Question Preview (ID: 52552)


Biology. TEACHERS: click here for quick copy question ID numbers.

A gene is:
a) A portion of a chromosome
b) The whole chromosome
c) Present outside the nucleus
d) All choices are correct

Self cross is a cross between :
a) F1 cross birecessive
b) F1 cross F1
c) None of the choices is correct
d) Made to determine the unknown genotype of the dominant allele.

A cross between white flower(pure) and red flower(pure) gives 100% pink flowers (F1) :
a) This is the case of Complete dominancy
b) Black allele dominates the white one
c) White allele dominates the black
d) This is the case of Incomplete dominance

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 .

A cross between yellow flower (pure) and blue flower (pure) gives 100% F1 (flowers of violet color):
a) This is the case of incomplete dominance
b) Y: is the symbol of white flower allele
c) B: is the symbol of blue flower allele
d) All choices are correct

A cross between a white mouse (pure) with a black mouse gives 100%grey mouses. The symbols that may be used are:
a) W: white B:black
b) W : white b: black
c) w: white B: black
d) Non of the choices

Hybrid genotype (meaning/examples):
a) Heterozygous
b) AB
c) BR
d) All choices are correct

A cross between pure red flower and a pink(RW) flower gives: (Incomplete dominance case)
a) 50 % red and 50% pink
b) 100% pure red
c) 50% red and 50% white
d) Non of the choices is correct

A cross between two pink flowers (RW) gives: ( Incomplete dominance case)
a) 100% red flowers
b) 100% white flowers
c) 50% white and 50% red flowers
d) 50% pink flowers, 25% red flowers , 25% white flowers

A cross between two white flowers (pure) gives:
a) 100% F1 with hybrid genotype
b) 50% pure and 50% hybrid F1
c) 100 F1% of pure genotype
d) Non of the choices is correct

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