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WorksheetsGenetics Review 2019
Total questions: 30
Worksheet time: 20mins
Name
Class
Date
1.
Having two different alleles for a trait (example Hh):
a)
homozygous
b)
heterozygous
c)
dominant
d)
purebred
2.
Two heterozygous parents produce offspring. What is the probability of the RECESSIVE PHENOTYPE appearing in the offspring generation?
a)
75%
b)
25%
c)
50%
d)
100%
3.
Two heterozygous parents produce offspring. What is the probability of the HOMOZYGOUS DOMINANT GENOTYPE appearing in the offspring generation?
a)
75%
b)
25%
c)
50%
d)
100%
4.
Two heterozygous parents produce offspring. What is the probability of the HOMOZYGOUS RECESSIVE GENOTYPE appearing in the offspring generation?
a)
75%
b)
25%
c)
50%
d)
100%
5.
Two heterozygous parents produce offspring. What is the probability of the HETEROZYGOUS GENOTYPE appearing in the offspring generation?
a)
75%
b)
25%
c)
50%
d)
100%
6.
Magda is a tall, 11 year old drummer. She has a scar on her right cheek. She is good at swimming. Which of her traits did Magda most likely inherit?
a)
height
b)
the scar
c)
ability to swim
d)
ability to play drums
7.
Magda is a tall, 11 year old drummer. She has brown eyes and naturally curly hair. Which of her traits did Magda most likely acquire?
a)
height
b)
curly hair
c)
eye color
d)
ability to play drums
8.
Which of the following is NOT a genotype?
a)
heterozygous
b)
black spots on fur
c)
Bb
d)
homozygous recessive
9.
What is another way of saying "hybrid"?
a)
heterozygous
b)
homozygous dominant
c)
homozygous recessive
d)
none of these choices
10.
What is the cause of some traits "skipping" a generation?
a)
dominant traits
b)
recessive traits
c)
hybrid alleles
d)
homologous chromosomes
11.
Different forms of genes:
a)
alleles
b)
phenotype
c)
genotype
d)
homologous chromosomes
12.
The passing of genetic traits from parent to offspring:
a)
allele
b)
gene
c)
heredity
d)
homozygous
13.
What is another way of saying "purebred"?
a)
homozygous
b)
dominant
c)
recessive
d)
heterozygous
14.
An organism's appearance or other observable characteristics:
a)
phentoype
b)
genotype
c)
recessive
d)
dominant
15.
An organism's genetic make-up:
a)
phenotype
b)
genotype
c)
dominant
d)
recessive
16.
The chances of something happening (example 1 in 4):
a)
genotype
b)
phenotype
c)
Punnett square
d)
probability
17.
Having two of the SAME alleles for a trait (example HH or hh):
a)
homozygous
b)
heterozygous
c)
recessive
d)
dominant
18.
HH is crossed with Hh. What is the probability of hh?
a)
0%
b)
25%
c)
50%
d)
100%
19.
bb is crossed with BB, what is the probability of Bb?
a)
0%
b)
25%
c)
50%
d)
100%
20.
FF is crossed with ff, what is the probability of the DOMINANT PHENOTYPE (black fur) appearing in the offspring generation?
a)
0%
b)
25%
c)
50%
d)
100%
21.
Two heterozygous parents produce offspring. What is the probability of the DOMINANT PHENOTYPE appearing in the offspring generation?
a)
75%
b)
25%
c)
50%
d)
100%
22.
In mice, the allele for brown coloring (B) is dominant, and the allele for gray coloring (b) is recessive. Which parents would have to cross to have a 100% chance of gray offspring?
a)
BbxBb
b)
bbxbb
c)
BBxbb
d)
BBxBB
23.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
24.
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
One has genotype BB the other Bb.
a)
they have same phenotype and genotype
b)
they have different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
25.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
BB
26.
Which of the following is true about dominant traits?
a)
the are more common than recessive traits
b)
they are better than recessive traits
c)
they are expressed when inherited
d)
they are recessive
27.
What is a mutagen?
a)
something that causes mutations
b)
DNA in the wrong order
c)
substitution mutation
d)
inversion
28.
Which of the following is true about mutations?
a)
they are always bad
b)
only some people have them
c)
they are changes in the DNA code
d)
they never cause diseases
29.
Which chromosome do all humans have at least one of?
a)
X
b)
Y
c)
Z
d)
none of these
30.
Who is considered the "father of genetics"?
a)
Gregor Mendel
b)
Reginald Punnett
c)
James Watson
d)
Matthias Schleiden
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