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WorksheetsEvolution Year 10 2
Total questions: 33
Worksheet time: 25mins
Name
Class
Date
1.
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%
2.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
3.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
4.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
5.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
6.
A corn plant heterozygous for tall sprouts mates with a corn plant with short sprouts. If tall sprouts are dominant, how many different phenotypes are possible in the offspring?
a)
1
b)
2
c)
3
d)
4
7.
If a Homozygous red snapdragon and a Heterozygous pink snapdragon were crossed - what percentage of the offspring would be homozygous white?
a)
0%
b)
25%
c)
50%
d)
75%
8.
Snapdragon flowers come in red, pink and white. What type of inheritance is this?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Codominance
d)
Polygenic Inheritance
9.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
10.
Which process and type of resulting cells are represented?
a)
mitosis, gametes
b)
mitosis, body cells
c)
meiosis, gametes
d)
meiosis, body cells
11.
Which of the following cell types is formed by meiosis?
a)
muscle cells
b)
skin cells
c)
sperm cells
d)
blood cells
12.
Which best describes the process shown?
a)
mutation in which the DNA content of the gene is ltered
b)
segregation of sister chromatids
c)
condensation and segregation of the alleles
d)
crossing-over which alleles are exchanged
13.
How many times in meiosis does the cell divided?
a)
2
b)
4
c)
3
d)
1
14.
When two haploid sex fuse together during fertilization they become ______________
a)
haploid cells
b)
meiosis
c)
mitochondria
d)
diploid cells
15.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
16.
Term for homozygous organisms that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
17.
Red/green color blindness is a recessive trait. A woman who is a carrier for this allele marries a normal-vision male. What is the probability that they will have a child who is color blind?
a)
1/4
b)
1/2
c)
3/4
d)
1
18.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
a)
none
b)
3/4
c)
1/2
d)
all
19.
What is a phenotype?
a)
The expression of a trait; what you see.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
20.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
21.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
22.
An organism's appearance is known as its
a)
heredity
b)
phenotype
c)
genotype
d)
pedigree
23.
Sex cells are produced through the process of
a)
mitosis
b)
cytokinesis
c)
binary fission
d)
meiosis
24.
In certain rats, black fur is dominant over white fur. If two rats, both heterozygous for fur color are mated, their offspring would be expected to have
a)
four different genotypes and two different colors
b)
two different genotypes and three different colors
c)
three different genotypes and two different colors
d)
three different genotypes and three different colors
25.
B=brown eyes
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
b= blue eyes
What is true about two brothers that have brown eyes?
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
26.
Brown (B) is dominant over white (b). Which genotype is a purebred for brown fur?
a)
BB
b)
Bb
c)
bb
d)
All of the above
27.
Which of the following genotypes is homozygous recessive?
a)
RR
b)
Rr
c)
rr
d)
None of the Above
28.
One reason for Mendel's success with genetic studies of peas was that he
a)
used only hybrid pea plants
b)
used peas with large chromosomes
c)
studied large numbers of offspring
d)
discovered the sources of variation in peas
29.
A cross of a red cow with a white bull produces all road offspring. This type of inheritance is known as
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
"breed time:
30.
Another word for homozygous is...
a)
purebred
b)
hybrid
c)
heterozygous
d)
dominant
31.
Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
32.
Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
33.
Tt is-
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
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