Worksheets8th Period Heredity Test
Total questions: 50
Worksheet time: 53mins
Name
Class
Date
1.
If a red rose were crossed with a white rose, what would be the color of the offspring? Red is the dominant trait, and the red rose does not carry the recessive gene. *HINT* Remember your study guide and make a Punnett Square ;)
a)
1/4 of the offspring would be white
b)
1/2 of the offspring would be red
c)
All offspring would be white
d)
All offspring would be red
2.
Which of the following is an inherited characteristic?
a)
what language a person speaks
b)
where a person lives
c)
a person's height
d)
a person's ability to use tools
3.
Which of the following is an inherited trait?
a)
playing an instrument
b)
reading a book
c)
eye color
d)
climbing a tree
4.
Which is a learned behavior?
a)
scratching an itch
b)
throwing a ball
c)
crying in pain
d)
having a dream
5.
Which of the following best describes genetics?
a)
passing traits from one generation to the next
b)
watching animals blend in to their environment
c)
comparing plants and animals living in the ocean
d)
spreading seeds in the forrest
6.
Mr. Camp has blue eyes, but both of his parents have brown eyes. How can this happen? What must be true of the blue eyes trait?
a)
It is a carrier trait that is never expressed
b)
It is a recessive trait
c)
It is a learned trait
d)
It is a dominant trait
7.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
8.
T - tall and t = short
In the punnett square below, what belongs in the missing square.
(Click the picture to see it without the text)
In the punnett square below, what belongs in the missing square.
(Click the picture to see it without the text)
a)
tt
b)
Tt
c)
Bb
d)
TT
9.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
10.
What are the possible genotypes for this cross?
(Click the picture to see it without the text)
(Click the picture to see it without the text)
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
11.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
12.
T - tall and t = short
In the punnett square below, what belongs in the missing square
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
13.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
14.
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
In the punnett square, what is the probability for white fur?
a)
0%
b)
25%
c)
50%
d)
75%
15.
In the punnett square shown, what is the genotypes of the two parents?
a)
RW and RR
b)
RW and WW
c)
RR and WW
d)
RW and RR
16.
In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?
a)
0%
b)
25%
c)
50%
d)
75%
17.
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
In the punnett square, what is the probability for white fur?
a)
0%
b)
25%
c)
50%
d)
75%
18.
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%
19.
A person heterozygous for wet earwax (Ww) mates with a person homozygous recessive for dry earwax. What is the chance their baby is heterozygous?
a)
0%
b)
25%
c)
50%
d)
100%
20.
Aa is
a)
homozygous (purebred)
b)
heterozygous (hybrid)
21.
In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?
a)
0%
b)
25%
c)
50%
d)
75%
22.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
23.
Recessive alleles may not be expressed because they are
a)
masked by a dominant allele
b)
the least common allele in a population.
c)
the most common allele in a population.
d)
less likely to have crossing over.
24.
Different forms of genes:
a)
alleles
b)
phenotype
c)
genotype
d)
homologous chromosomes
25.
What is another way of saying "purebred"?
a)
homozygous
b)
dominant
c)
recessive
d)
heterozygous
26.
An organism's genetic make-up:
a)
phenotype
b)
genotype
c)
dominant
d)
recessive
27.
The dominant trait as seen in this punnett square is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
28.
Red flower (R) color is dominant to white flower (r) color in rose plants. What is the expected phenotypic results of a cross between two heterozygous (Rr) rose plants?
a)
100% red
b)
75% red, 25% white
c)
50% red, 50% white
d)
75% white, 25% red
29.
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%
30.
Which is a tool that is used to predict genetic crosses?
a)
a Venn diagram
b)
a slide rule
c)
a Punnett square
d)
a tally sheet
31.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
32.
What is the phenotype of the heterozygous parent in the punnett square?
a)
green
b)
yellow
c)
hybrid
d)
purebred
33.
What are the major structures in the nucleus that are made of DNA called?
a)
gene
b)
DNA
c)
chromosome
d)
mitochondria
34.
What chart is used to predict possible outcomes of offspring based on the genes of the parents?
a)
punnett square
b)
periodic table
c)
dihybrid cross
d)
T-chart
35.
If a red flower is dominant to a white flower, but a pink flower is produced, this is an example of
a)
incomplete dominance
b)
co-dominance
36.
In flowers, both red and white are dominant. When combined they produce a flower with red and white spots. This is an example of
a)
incomplete dominance
b)
co-dominance
37.
What is a segment of DNA called?
a)
Chromosome
b)
gene
c)
dominant trait
d)
nucleus
38.
When the dominant gene doesn't completely mask the recessive gene, this is called ____________.
a)
Incomplete dominance
b)
co-dominance
c)
complete dominance
d)
shared dominance
39.
What is a gene?
a)
A segment of DNA
b)
A structure in the nucleus
c)
Long double helix strands that make up a chromosome
40.
What type of inheritance is determined by multiple genes located at different loci on different chromosomes and there can be a range of traits?
a)
Codominance
b)
Incomplete dominance
c)
Polygenic traits
41.
How many alleles does someone have for a genotype?
a)
1
b)
2
c)
3
d)
4
42.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
43.
If this image were real, it would represent what type of inheritance?
a)
incomplete dominance
b)
codominance
c)
polygenic inheritance
d)
compete dominance
44.
What pattern of inheritance is shown in this image?
a)
Codominance
b)
Incomplete dominance
c)
Polygenic traits
45.
Genetics is:
a)
The study of heredity and genes
b)
how we pass traits to our kids
c)
The study of pea plants
d)
a class you take in college
46.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
47.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
48.
What does a Punnett Square help you do?
a)
Determine the ratio of phenotypes
b)
Determine the ratio of genotypes
c)
Predict possible traits the offspring will have
d)
All of the above
49.
When there are several different genes for a trait
a)
codominance
b)
polygenic inheritance
c)
multiple alleles
d)
incomplete dominance
50.
A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
100 %
