NEW
Font size
S
M
L
XL
WorksheetsGenetics-2
Total questions: 32
Worksheet time: 16mins
Name
Class
Date
1.
Pea plants can have green or yellow seeds. In a pea plant that is heterozygous for seed color, the allele for yellow seeds masks the effects of the allele of green seeds. Which of the following terms best describes the allele for yellow seeds?
a)
codominant
b)
recessive
c)
dominant
d)
sex-linked
2.
In mussels, the allele for brown coloring (B) is dominant, and the allele for blue coloring(b) is recessive. For which parental genotypes are 100% of the offspring expected to be blue?
a)
BbxBb
b)
bbxbb
c)
BBxbb
d)
BBxBB
3.
In guinea pigs, the alleles for black hair(B) is dominant to the allele for brown hair(b). Two black-haired guinea pigs are crossed. One of the pigs is homozygous for black hair and one is heterozygous. What percentage of their offspring are expected to have black hair?
a)
25%
b)
50%
c)
75%
d)
100%
4.
In a flowering plant species, red flower cover is dominant over white flower color. What is the genotype of any red-flowering plant resulting from this species?
a)
red and white alleles present on one chromosme
b)
red and white alleles present on two chromosomes
c)
a red allele present on both chromosmes
d)
a red allele present on at least one of the two homologous chromosomes.
5.
Which will most likely cause a gene to mutate?
a)
water
b)
radiation
c)
soil
6.
What advantage do organisms that reproduce sexually have or organisms that reproduce asexually?
a)
Organisms that reproduce sexually can reproduce faster
b)
Organisms that reproduce sexually don't need a mate
c)
Organisms that reproduce sexually have a better chance of survival if the environment changes
d)
Organisms that reproduce sexually are exactly like their parents.
7.
Unattached earlobes (E) is dominant. Attached earlobes (e) is recessive. A woman with the genotype (Ee) and a man with the genotype (ee) have a child. What is the probability that the child is heterozygous?
a)
0%
b)
25%
c)
50%
d)
75%
8.
If the allele for gray fur (G) is dominant to the allele for white fur (g) in mice, What will be the ratio if you cross a heterozygous gray mouse with a white mouse?
a)
3GG : 0Gg : 1gg
b)
2GG : 1Gg : 1gg
c)
1GG : 2Gg : 1gg
d)
0GG : 2Gg : 2gg
9.
In cocker spaniels the allele for a black coat color (B) is dominant over the allele for a brown coat color (b). If a brown cocker spaniel is crossed with a heterozygous black cocker spaniel, which of the following genotypic ratios can be expected?
a)
0BB : 2Bb : 2bb
b)
1BB : 2Bb : 1bb
c)
2BB : 0Bb : 2bb
d)
2BB : 1Bb : 0bb
10.
What is being depicted in this picture?
a)
sexual reproduction
b)
anaphase I of meiosis
c)
crossing-over
d)
replication
11.
A type of gene that can be hidden is called
a)
genotype
b)
recessive
c)
dominant
d)
allele
12.
A dominant trait shows up __________.
a)
only when two dominant alleles are present
b)
only when one dominant allele is present
c)
when at least one recessive allele is present
d)
when at least one dominant allele is present
13.
A recessive trait only shows up when __________.
a)
two dominant alleles are present
b)
one dominant allele is present
c)
two recessive alleles are present
d)
at least one dominant allele is present
14.
Purebred is another word for __________, while hybrid is another word for __________.
a)
dominant; recessive
b)
recessive; dominant
c)
homozygous; heterozygous
d)
heterozygous; homozygous
15.
The two different forms of a gene are called _________.
a)
zygotes
b)
traits
c)
phenotypes
d)
alleles
16.
Objective #13
This is a pedigree that follows blue eyes which is a recessive trait. What is the genotype of the father (square) in generation 1?
a)
Aa
b)
AA
c)
aa
d)
A?
17.
Objective #13
This is a pedigree that follows blue eyes which is a recessive trait. What is the genotype of the mother (circle) in generation 1?
a)
Aa
b)
AA
c)
aa
d)
A?
18.
Objective #13
This is a pedigree that follows blue eyes which is a recessive trait. What are the genotypes of the parents (1&2) in generation 2?
a)
Aa, AA
b)
aa, aa
c)
AA, AA
d)
Aa, Aa
19.
Objective #13
On a pedigree how do we know if they have the trait?
a)
Not shaded
b)
Shaded
20.
When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs
a)
crossing over
b)
mutagenesis
c)
hybridization
d)
fertilization
21.
The chromosomes that pair up during meiosis, are called __________ chromosomes.
a)
homozygous
b)
asexual
c)
homologous
d)
genes
22.
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
ATG TGA CAG
a)
ATG TGA CAG
b)
TAC ACT GTC
c)
GTA AGT GAC
d)
CAT TCA CTG
23.
What mutation has occurred here?
T-G-A-C-C-A
T-G-A-G-C-A
T-G-A-C-C-A
T-G-A-G-C-A
a)
Substitution
b)
Deletion
c)
Insertion
d)
Frameshift
24.
ATTTGAGCC- Original
ATTGAGCC - Mutated
The example above is an example of a
ATTGAGCC - Mutated
The example above is an example of a
a)
Insertion- Frameshift
b)
Deletion- Substitution
c)
Deletion -Frameshift
d)
All of the above
25.
A type of substitution in which no amino acids change is called
a)
Missense
b)
Nonsense
c)
Silent
d)
Deletion
26.
If a cell has an abnormal number of chromosomes, usually from meiosis, what is this considered? Choose the best answer.
a)
Chromosome mutation
b)
Nondisjunction
c)
Sex-linked mutation
d)
Inversion
27.
True or False. With the genetic disorder known as Down Syndrome, a person's cells have an extra copy of chromosome 21.
a)
True
b)
False
28.
Which of the following could be used as a vector for a human gene?
a)
Bacterial Plasmid
b)
Bacteria
c)
A mitochondria
d)
mRNA
29.
Find the degrees of freedom.
a)
4
b)
5
c)
6
d)
7
30.
Which significance level
(column) do you look at when finding the critical value?
(column) do you look at when finding the critical value?
a)
.50
b)
.10
c)
.05
d)
.01
31.
How do you find degrees of freedom?
a)
one less than the possible genotypes
b)
one less than the possible phenotypes
c)
total number divided 2
d)
total number times 2
32.
How do you find critical value?
a)
where degrees of freedom lines up with significance level
b)
where significance level lines up with chi-square
c)
the difference between total and chi-square
d)
degrees of freedom minus significance level
Reset
