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WorksheetsGenetics Review 7th grade
Total questions: 37
Worksheet time: 22mins
The Jolly Green Giant is heterozygous for his green feet. His wife is recessive for her Yellow Bean Feet. What are the genotypes of the offspring?
GG,gg
Yellow bean feet
Gg,GG
Gg, gg
The Jolly Green Giant is heterozygous for his green feet. His wife is recessive for her Yellow Bean Feet. What are the phenotypes of the offspring? (all)
Green Bean feet
Yellow Bean feet
Green Bean feet, yellow bean feet
GG, gg
The Jolly Green Giant is heterozygous for his green feet. His wife is recessive for her Yellow Bean Feet. What percent of offspring with green feet? (Use punnet square)
0%
50%
25%
100%
The Jolly Green Giant is heterozygous for his green feet. His wife is recessive for her Yellow Bean Feet. What percent of offspring have yellow feet?
50%
25%
100%
0%
The Jolly Green Giant is heterozygous for his green feet. His wife is recessive for her Yellow Bean Feet. Ratio of green to yellow.
3:1
4:0
8:4
2:2
The Jolly Green Giant is heterozygous for his green feet. His wife is recessive for her Yellow Bean Feet. What percent of their offspring would be hybrid?
50%
100%
0%
25%
The Jolly Green Giant is heterozygous for his green feet. His wife is recessive for her Yellow Bean Feet. What percent of their offspring would be purebred?
0%
25%
50%
100%
Complete the DNA strand. TACGTCAGT
ATGCACACT
ACTGAGCTT
ATGCAGTCA
AGTATTGCA
How is it possible for offspring to show a trait that neither of the parent physically?
If one parent is homozygous dominant and the other is homozygous recessive, then there is 100% chance of a dominant trait showing up.
If both parents are heterozygous (dominant) there is a 25% chance of a recessive trait.
If the parents are homozygous dominant, then the kid will be homozygous recessive.
The genotype is made up of alleles andthe phenotype is made up of physical characteristics.
What sex chromosomes are found in females?
XX
XY
23
egg
What sex chromosomes are found in males?
XX
XY
23
XXY
Which parent determines the gender of their offspring?
Female
Male
Neither, it is already chosen
The nucleus
When having offspring, what are the chances of having a girl? A boy?
50%50%
50%0%
100%0%
0%25%
How many chromosomes do humans have?
46(23 pairs)
48(24 pairs)
82(41 pairs)
32(16 pairs)
What is an example of a body cell?
Skin cell
Sperm
Egg
What is an example of a sex cell?
Skeletal
Egg
Cardiovascular
If an organism's body cell has 20 chromosomes, how many would the body cells have?
5
4
10
40
If an organism's sex cells have 12 chromosomes, how many would the body cell have?
24
6
4
Adenine
What letters represent the nitrogen bases in DNA?
A, T, C, G
A, B, C, D
A, P, D, T
A, Z, C, T
How are the DNA bases paired up?
Adrenalin and Thymin, Citosine and Guacomole
Adrenaline and Citosine, Thymin and Guacomole
Adenine and Thymine, Cytosine and Guanine
Adenine and Cytosine, Thymine and Guanine
Using Chagraff's rules, if there is 42% of Thymine is DNA, what percent of Adenine would there be?
58%
42%
84%
78%
What is the difference between codominance and incomplete dominance?
Incomplete dominance is when the traits combine, but each one is expressed in the offspring. Codominance is a blending of the traits
Incomplete dominance is a blending of the traits. Codominance is when the traits combine, but each one is expressed in the offspring.
How is cloning like asexual reproduction?
The two are alike because they both make different copies from two parent organisms.
They both use two organisms and combine them.
They aren't like each other. They are two different things.
The two are alike because they both make an exact copy of each other.
What does a pedigree help us do?
Trace where our ancestors came from.
It helps us do nothing.
Trace a trait through a family tree.
Find out every whether we like reading or not.
What shape stands for male?
Square
Circle
Triangle
Kite
What shape stands for female?
Square
Circle
Triangle
Kite
What does a shaded shape mean?
Affected (homozygous)
carrier (heterozygous)
Unaffected (homozygous)
Affected (heterozygous)
What does a blank shape mean?
Affected (homozygous)
carrier (heterozygous)
Unaffected (homozygous)
Affected (heterozygous)
What does a half shaded shape mean?
Affected (homozygous)
carrier (heterozygous)
Unaffected (homozygous)
Affected (heterozygous)
In what generation is there an individual that is homozygous for freckles? Who is it?
Generation I / Gen I-1
Generation II / Gen II-2
Generation III / Gen III-1
None
How many girls have freckles in the third generation? Who are they?
2 / Gen III-1, 3
2 / Gen III- 2, 3
1 / Gen III-3
None
How many individuals in the pedigree have freckles? Who are they?
2 / Gen II- 2 Gen III-3
5 / Gen I-1,2 Gen II-1 Gen III- 2, 3
2 / Gen I-2 Gen III-3
None
How many individuals are heterozygous for freckles? Who are they?
4 / Gen I- 1 Gen II- 2 Gen III- 2, 3
1 / Gen I-1
4 / Gen I- 2 Gen II- 1 Gen III- 2, 3
None
How many individuals are homozygous recessive for freckles? Who are they?
4 / Gen I- 2 Gen II- 1 Gen III- 2, 3
2 / Gen II-2 Gen III- 2, 3
1 / Gen I- 1
None
Mitosis makes ______ daughter cells that have _____________ as the parent cell.
2 / half the number of chromosomes
4 / the same amount of chromosomes
4 / half the number of chromosomes
2 / the same amount of chromosomes
Meiosis makes ______ daughter cells that have _____________ as the parent cell.
2 / half the number of chromosomes
4 / the same amount of chromosomes
4 / half the number of chromosomes
2 / the same amount of chromosomes
Explain how the following are related: Genes, Proteins, Chromosomes, and Nucleus
The nucleus is the control center of the cell. Inside is DNA which is a set of instructions used to make proteins. When DNA is coiled up it makes chromosomes. On each chromosome there are many genes. Genes call for specific proteins to be made that determine characteristics like eye color, height, dimples, freckles, and hitchhikers thumb.
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