NEW
Font size
S
M
L
XL
WorksheetsGenetics Review
Total questions: 26
Worksheet time: 13mins
Name
Class
Date
1.
What are factors that control traits called?
a)
Genes
b)
Purebreds
c)
Recessives
d)
Parents
2.
What does the notation NN mean to geneticists?
a)
Two Dominant Alleles
b)
Heterozygous Alleles
c)
At least one dominant allele
d)
One dominant allele and one recessive allele
3.
An organism's physical appearance is known as its?
a)
Genotype
b)
Phenotype
c)
Codominance
d)
Heterozygous
4.
What is the chromosome theory of inheritance?
a)
Chromosomes are carried from parents to offspring on hybrids.
b)
Genes are carried from parents to offspring on chromosomes.
c)
Hybrid pairs of chromosomes combine to form new hybrids.
d)
Codominant genes combine to form new hybrids.
5.
When sex cells combine to produce offspring, each cell will contribute?
a)
1/4 the number of chromosomes in body cells.
b)
1/2 the number of chromosomes in body cells.
c)
The normal number of chromosomes in body cells.
d)
Twice the number of chromosomes in body cells.
6.
What happens during meiosis?
a)
2 sex cells combine
b)
Chromosome pairs separate and are distributed into new sex cells.
c)
Each sex cell copies itself to from 4 new chromosomes.
d)
Chromosome pairs remain together when new sex cells are formed.
7.
What is a mutation?
a)
Any change that is harmful to an organism.
b)
Any change in a gene or chromosome.
c)
Any change that is helpful to an organism.
d)
Any change in the phenotype of a cell.
8.
Where does protein synthesis take place?
a)
In the ribosomes in the nucleus of the cell.
b)
On the ribosomes in the cytoplasm of the cell.
c)
In the chromosomes in the nucleus of the cell.
d)
On the chromosomes in the cytoplasm of the cell.
9.
Chromosomes are made up of
a)
one pair of alleles.
b)
many traits joined together.
c)
transfer RNA.
d)
many genes joined together.
10.
What is the probability of producing a tall pea plant from a genetic cross between 2 hybrid tall pea plants?
a)
1 in 4
b)
2 in 4
c)
3 in 4
d)
4 in 4
11.
If a homozygous black guinea pig (BB) is crossed with a homozygous white guinea pig (bb), what is the probability that an offspring will have black fur?
a)
25%
b)
50%
c)
75%
d)
100%
12.
If a ______________ allele is present, its trait will appear in the organism.
a)
Dominant
b)
Recessive
c)
Heterozygous
d)
Homozygous
13.
If D represents the dominant allele of a gene, then ______ represents the recessive allele.
a)
DD
b)
r
c)
R
d)
d
14.
In a cross between 2 hybrids Tt pea plants, _______ percent of the offspring will be Tt.
a)
0
b)
25
c)
50
d)
75
15.
Which trait, tall or short plants is controlled by a dominant allele?
a)
T
b)
t
c)
P
d)
p
16.
Which of the following genotypes represent a purebred pea plant for white flowers. W=White flowers, w=purple flowers.
a)
Ww
b)
ww
c)
WW
d)
None of these
17.
With a genotype of Ww what would the phenotype be? W=White Flowers, w=purple flowers.
a)
White
b)
Purple
c)
White and Purple
d)
None of these
18.
Meiosis and Mitosis are the same thing.
a)
True
b)
False
19.
The process that occurs in the formation of sex cells (sperm and egg) by which the number of chromosomes is reduced by half.
a)
Cell Division
b)
Mitosis
c)
Meiosis
d)
Cell Replacement
20.
The stage of the cell cycle during which the cell's nucleus divides into two new nuclei and one copy of the DNA is distributed into each daughter cell.
a)
Mitosis
b)
Meiosis
c)
Cell Division
d)
Cell Replacement
21.
For an organism to display a recessive phenotype they can never be a hybrid.
a)
True
b)
False
22.
All mutations are harmful.
a)
True
b)
False
23.
A gene that is carried on the X or Y chromosome.
a)
Sex Chromosomes
b)
Sex-Linked Gene
c)
Mutations
d)
Genetics
24.
Males are more likely to inherit sex-linked genes that females.
a)
True
b)
False
25.
Genetic disorder where blood clots slowly, found more often in males than females.
a)
Cystic Fibrosis
b)
Sickle Cell
c)
Hemophilia
d)
Down Syndrome
26.
How many chromosomes are found in sex cells?
a)
46
b)
0
c)
23
d)
12
Reset
