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WorksheetsLS 12 Genetics
Total questions: 39
Worksheet time: 25mins
Name
Class
Date
1.
What is the definition of phenotype?
a)
The physical expression of a trait
b)
The genetic combination of alleles
c)
A gene on the DNA strand
2.
What is the definition of genotype?
a)
The physical expression of a trait
b)
The genetic combination of alleles
c)
the genes on a DNA strand
3.
The condensed form of DNA is called________________
a)
an allele
b)
a gene
c)
a chromosome
d)
a phenotype
4.
Where, in the eukaryotic cell, is DNA located?
a)
ribosomes
b)
nucleus
c)
E.R.
d)
cytoplasm
5.
Which of the following will only show if two alleles are present?
a)
a dominant trait
b)
a recessive trait
6.
What is the percentage of offspring that have green pods?
a)
100%
b)
75%
c)
50%
d)
25%
7.
What percentage of the offspring in the punnett square are shown as a hybrid?
a)
100%
b)
75%
c)
50%
d)
25%
8.
What is the phenotype of the heterozygous parent in the punnett square?
a)
green
b)
yellow
c)
hybrid
d)
purebred
9.
This image shows a...
a)
Punnett Square
b)
Phenotype
c)
Genotype
d)
Dominant allele
10.
A phenotype is the...
a)
letter combination
b)
dominant gene
c)
recessive gene
d)
physical appearance
11.
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
12.
B - black, b - brown. Two black mice mate and have some black and some brown mice. What is the genotype of the parents?
a)
BB x Bb
b)
BB x bb
c)
Bb x Bb
d)
Bb x bb
13.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
14.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
15.
If something is heterozygous, it is also...
a)
purebred
b)
hybrid
c)
dominant
d)
recessive
16.
Another word for homozygous is...
a)
purebred
b)
hybrid
c)
heterozygous
d)
dominant
17.
A phenotype is the...
a)
letter combination
b)
dominant gene
c)
recessive gene
d)
physical appearance
18.
Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
19.
Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
20.
Tt is-
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
21.
Which represents the genotype of a homozygous condition?
a)
Bb
b)
BC
c)
bb
d)
bc
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.
If the four existing children in a family are all sons, what chance would there be that the next child would also be a son?
a)
75%
b)
50%
c)
25%
d)
20%
24.
Which of the following genotypes is homozygous recessive?
a)
RR
b)
Rr
c)
rr
d)
None of the Above
25.
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
26.
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
27.
If a portion of Strand I of DNA has the base sequence GATCAC, what is the sequence of bases on the complementary Strand II?
a)
GATCAC
b)
CUAGUG
c)
CTACAC
d)
CTAGTG
28.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
29.
Adenine bonds with ______________.
a)
Guanine
b)
Thymine
c)
Cytosine
d)
Adenine
30.
Makes proteins using directions from DNA.
a)
ribosome
b)
nucleus
c)
ER
d)
golgi bodies
31.
Produces four sex cells, sperm or egg, that are used to pass a paren't trait to offspring.
a)
Mitosis
b)
Meiosis
c)
Reproduction
d)
Fertilization
32.
The scientific study of heredity.
a)
Biology
b)
Gene Therapy
c)
Genetic Counseling
d)
Genetics
33.
The passing of physical characteristics from parent to offspring.
a)
Genetics
b)
Heredity
c)
Science
d)
Cloning
34.
The trait that hide in the background (lower case), can only be expressed in homozygous form (ex: hh)
a)
dominant
b)
recessive
c)
heterozygous
d)
carrier
35.
Deoxyribonucleic acid.
a)
DrNA
b)
RNA
c)
DNA
d)
CIA
36.
People with an extra copy of chromosome 21 have a disorder called
a)
Down syndrome
b)
hemophilia
c)
colorblindness
d)
amniocentesis
37.
The transfer of genes from one organism to another is called
a)
hybridization
b)
selective breeding
c)
cloning
d)
genetic engineering
38.
A(n)______________________ is an organism that is genetically identical to the organism from which it was produced.
a)
hybridization
b)
Amniocentesis
c)
gene therapy
d)
clone
39.
Contains DNA and controls cell activities.
a)
ribosome
b)
nucleus
c)
RNA
d)
vacuole
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