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WorksheetsGenetics
Total questions: 50
Worksheet time: 25mins
DNA has what shape?
twisted ladder
double helix
both
neither
In human reproduction a baby-
Receives 46 chromosomes from both parents
Can inherit only 46 genes
Receives 46 chromosomes from either parent
Gets half of its chromosomes from the male and half from the female
Meiosis is:
The basic substance of heredity
The reproduction of body cells
The process of changing genes to produce a new trait
A special kind of cell division producing sex cells
The hereditary material that controls all cellular
activities is called-
ATP
Cytoplasm
DNA
Chloroplast
The picture shows
Chromosomes
Punnett Square
Phenotypes
Genotypes
In guinea pigs, brown fur (B) is dominant over white fur (b).
Design a Punnett square to demonstrate the possible outcome if a purebred brown guinea pig is crossed with a purebred white guinea pig.
What percentage of the offspring will have white fur?
100%
0%
25%
50%
What are the main components of DNA? (choose all that apply)
Oxides
Nitrogen Bases
Phosphates
Sugar
Carbon Bases
Which of the following traits are inheritable? (Choose all that apply)
Size of lips
Dimples
Hair color
Shape of nose
Calluses on hand
Hybrid or heterozygous are -
an allele whose trait always shows up in an organism when
it is present
the set of information that controls a trait; code in DNA
the passing of traits from parents to offspring
the different forms of the gene
an organism that has two different alleles for a trait
an allele whose trait always shows up in an organism when
it is present
Hybrid
Dominant
Recessive
Gene
Alleles
The set of information that controls a trait; code in DNA
Gene
Traits
Alleles
Heredity
The passing of traits from parents to offspring
Alleles
Gene
Heredity
Adaptation
The different forms of the gene
Dominant
Alleles
Adaptations
Phenotype
Developed the theory of Evolution
Gregor Mendel
Charles Darwin
Watson & Crick
Rosalind Franklin
Created the first model of DNA; won a Nobel Prize
Charles Darwin
Gregor Mendel
Watson & Crick
Rosalind Franklin
In the Punnett square, Black fur (B) is dominant over brown
fur (b). What is the phenotype of all four offspring?
Brown
Black
White
Mix of brown and black
Of the traits listed in the table, which ones are not inherited?
B, C, F, and G
A, C, E, and H
B, C, E, and H
A, D, F, and G
In Deoxyribonucleic Acid, Cytosine pairs with the nitrogen base -
thymine
adenine
guanine
none of the above
Which scientists were the first to develop an accurate model of the DNA molecule?
Robert Hooke and Anton van Leeuwenhoek
Rosalind Frankln and Gregor Mendel
James Watson and Francis Crick
Gregor Mendel and Walter Sutton
The hereditary material that controls all cellular activities is called -
Cytoplasm
DNA
Chloroplasts
ATP
Genetic engineering can be used in a variety of ways. If the methods of genetic engineering are used to insert human genes into the cytoplasm of bacteria, the bacteria will then -
destroy the foreign DNA
produce human proteins
become a new species of bacteria
no longer be bacteria
When scientists alter the genetic code of an organism, it is called -
Mitochondrial DNA
Genetic Engineering
botany
Cloning
What traits could represent the phenotype of an organism?
Tt, purple
wrinkled, ww
yellow, tall
Rr, RR
Which section of the shown figure carries the code for a particular trait in an organism?
Section W
Section X
Section Y
Section Z
If free ear lobes (L) are dominant over attached ear lobes (l) what is the phenotype of an individual with a genotype of ll?
Attached ear lobes
Detached ear lobes
LL
One ear lobe attached, one ear lobe detached
In rabbits, black fur (B) is dominant over white fur (b). If a heterozygous (hybrid) black rabbit mated with a homozygous (purebred) white rabbit, what percentage of the offspring will have black fur?
75%
0%
100%
50%
In a genotype, what does the lower case letter represent?
The dominant trait
The recessive trait
The multiple trait
Genotypes are always capital letters
Of the choices listed below, where is genetic engineering most often applied?
Solar panels and electricity
Dish detergents and shampoo
Medicine and agriculture
Dentistry and computers
Widow's peak (W) is a dominant trait. Straight hairline (w) is a recessive trait. If parents that are both hybrids (Ww) for the trait have 4 children, how many of the 4 children will
express widow's peak?
1
2
3
4
What forms the chemical code within a molecule of DNA?
The arrangement of the sugars and bases
The arrangement of the nitrogenous bases
The arrangement of the phosphates and sugars
The arrangement of the chromosomes
What is the chromosome labeled in the picture?
Section W
Section X
Section Y
Section Z
The chemist who was able to create images of DNA molecules using X-ray diffraction was-
Gregor Mendel
James Watson
Rosalind Franklin
Robert Hooke
Research shows that genes can successfully be put into potato plants and produce vaccines against cholera and hepatitis B. What is the name for this type of research?
Genetic Engineering
Chromosome Mutation
Artificial or Selective Breeding
Cloning
Which sex chromosome combination is for a female?
XX
XY
XYY
YY
DNA is sometimes referred to as a ladder. Which two molecules make up the sides of the DNA ladder?
phosphate and ribose
phosphate and deoxyribose
nitrogen base and ribose
phosphate and nitrogen base
What is NOT an example of DNA technology currently used in agriculture?
The use of growth hormones produced from recombinant bacteria to increase milk production
The cloning of human nerve cells from corn plants
The development of frost resistant crop plants
The development of pesticide resistant crop plants
How many chromosomes are normally found in a human sex cell?
46
48
23
2000
In Deoxyribonucleic acid, Adenine pairs with the nitrogen base -
cytosine
guanine
adenine
thymine
What is an organism called that has two different genes for a trait? (examples: Tt or Rr)
A hybrid/heterozygous
A purebred/homozygous
A mutation
An endangered species
Scientists have genetically engineered certain crops to be resistant to the harmful effects of pesticides. What is one advantage of this modification?
The crops could potentially pass this modification onto the pest, which would allow the pest to eat the crops.
The farmer will not kill his crops when defending them against a pest.
The farmer will produce crops that could be potentially harmful to human consumption.
The crops could have slower growing rates because of their modified genes.
When Mendel worked with pea plants, he noticed that
some traits, like round seeds, seemed to hide other traits,
like wrinkled seeds. What do we call the trait that hides or
masks another trait?
A recessive trait
A dominant trait
DNA Replication
Incomplete Traits
If the tall trait is dominant over the short trait, which
would be used to represent the dominant trait?
T
t
S
s
What could represent the genotypes of an organism?
Wrinkled, gY
Tall, red
Rr, TT
Tt, green
In the Punnett Square, the white petal color is dominant (W) over the purple petal color which is recessive (w). Of the four offspring, how many will have a white phenotype?
1
2
3
4
According to the Punnett Square, what is the genotype of the parents?
WW and WW
ww and ww
ww and Ww
Ww and Ww
A change or mistake in the DNA can cause-
Meiosis
Mutation
Adaptation
Blending
In the Punnett Square, what are the genotypes of the parents?
BB and BB
bb and bb
BB and bb
Bb and bb
How did Rosalind Franklin's work contribute to our understanding of DNA?
Her photographs of the molecule showed that it was spiral.
She made a dimensional model of the structure of DNA
She analyzed the molecule and showed it had four nitrogen bases.
She demonstrated how to transfer DNA from one organism to another
When scientists take one gene and put it into another it is called -
Mutation
Genetic Engineering
Cloning
Selective Breeding
If the entire insect population migrated out of the spider's habitat, which spider would most likely become extinct if it could not adapt to this change?
1
2
3
4
