7
·
I th · · ·
that appears is
n e Joining together of two different genes for the same trait, th e one
t
(1) dominant
(2) recessive
(3) pure
(4) mutan
s· o. n1Y red tuhps
·
•
r Which statement
result from the cross between pure red and pure white tu ips.
Is true?
(1) Red is a dominant trait.
(2) Red is a recessive trait.
(3) Red is more common in the warmer spring weather.
(4) Red is a gene mutation.
9 . In squirrels gray (G) is dominant over black (g) fur color. If a Gg squirrel is crossed wi th a
gg squirrel, what is the probability that the offspring will have black fur?
(1)0%
(2)25%
(3)50%
(4)100%
10. The pedigree chart traces the appearance of earlobes through three generations of a family·
Based on this chart, attached earlobes is a
·
Key
(1) dominant trait
PHENOTYPE
MALE FEMALE
(2) recessive trait
•
0
(3) mutated trait
(4) trait common in females
unattached earlobes
attached earlobes
11. Most cells in the human body contain 46 chromosomes. How many of these chromosomes
were contributed by each parent?
(1) 15
(2) 23
.
(3) 46
(4) 92
12 _ A change in genetic material that produces a variation in a species may be caused by
(1) a mutation
(3) overp rod uction of egg cells
(2) competition
(4 ) a st ruggle for survival
GENETICS
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