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WorksheetsGenetics Intro Review
Total questions: 11
Worksheet time: 15mins
Name
Class
Date
1.
Brown eyes are:
a)
dominant
b)
recessive
2.
The mating of two organisms is a cross
a)
true
b)
false
3.
An organisms observable physical traits
a)
genotype
b)
phenotype
4.
A punnet square helps show ....
a)
mutations
b)
the law of segregation
5.
Which trait is most likely to show in the offspring?
a)
Dominant traits
b)
Recessive Traits
6.
The alleles shown for blue eyes are
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous dominant
d)
heterozygous recessive
7.
The circled Hh alleles seen in the photo are:
a)
homozygous
b)
heterozygous
8.
What determines the traits of an organism?
a)
number of nitrogen bases
b)
presence of ribose or deoxyribose in a nucleic acid
c)
sequence of nitrogen bases in DNA
d)
ratio of AT to CG base pairs
9.
A particular variety of corn can produce yellow or white seeds. Yellow is dominant. White is recessive.
If an ear of corn contains only white corn, it must be:
If an ear of corn contains only white corn, it must be:
a)
homozygous for white color
b)
heterozygous for white color
c)
heterozygous for yellow color
d)
homozygous for yellow color
10.
Using the punnet square photo, what percentage of the offspring will be green?
a)
75%
b)
50%
c)
25%
d)
0%
11.
In guinea pigs, the allele for rough coat (R) is dominant over smooth coat (r).
A heterozygous guinea pig and a homozygous recessive guinea pig are mated.
What phenotypes will the offspring show?
A heterozygous guinea pig and a homozygous recessive guinea pig are mated.
What phenotypes will the offspring show?
a)
all rough coat
b)
all smooth coat
c)
2 rough and 2 smooth coat
d)
3 rough and 1 smooth coat
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