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Genetics Review 1
Test Description: DNA, Genes, Chromosomes, Genetics Vocabulary, Punnett Squares, Types of Reproduction, Selective Breeding
Instructions: Answer all questions to get your test result.
1) Who first described the principles of heredity?
A
Reginald Punnett
B
Gregor Mendel
C
Ms. Lightsey
D
Robert Hooke
2) A purebred green pea plant is crossed with a purebred yellow pea plant. The result is the first generation all appearing green. If 2 offspring from this first generation are crossed, what would be the probable appearance of the 2nd generation?
A
75% Green, 25% Yellow
B
50% Green, 50% Yellow
C
0% Green, 100% Yellow
D
100% Green, 0% Yellow
3) What is DNA made of?
A
Bases
B
Phosphates
C
Sugars
D
Nucleotides
4) What are the advantages of sexual reproduction
A
More parental care and genetically identical offspring
B
Genetically different offspring and less parental care
C
More parental care and genetically different offspring
D
Genetically identical offspring and less parental care
5) Homozygous purple flowers and white flowers were crossed and resulted in all purple offspring. What does this tell us about purple flowers?
A
White flowers are dominant over purple flowers
B
Purple flowers are dominant over white flowers
C
Purple flowers are recessive
D
Purple and white flowers are co-dominant
6) Brown eyes are dominant to blue eyes. If there is a 100% chance that an individual will have brown eyes, what is the genotype of the parents?
A
BB x BB
B
All are possibilities
C
BB x Bb
D
BB x bb
7) If one side of a DNA strand is AGTCCG, what would the complementary sequence on the other side be?
A
TATGCC
B
CGGACT
C
TCAGGC
D
GGATCG
8) What are similarities between asexual and sexual reproduction
A
Both have identical offspring
B
There are no similarities
C
Both involve 1 parent
D
Both pass traits from parents to offspring
9) What is heredity?
A
The study of how traits are passed from parents to offspring.
B
The passing of traits from parents to offspring.
C
A type of reproduction involving 2 parents.
D
A type of reproduction involving 1 parent.
10) What is a dominant allele?
A
The genetic combination of an organism.
B
The allele that masks or covers up the recessive allele. It always shows up if it is present.
C
The allele that gets masked or covered up.
D
The same allele on different genes.
11) What is the shape of DNA called?
A
Spiral
B
Twisted Ladder
C
Trapezoid
D
Double Helix
12) What's the difference in sex cells and body cells?
A
Body cells have half the number of chromosomes, sex cells have the same number.
B
Sex cells create identical cells, body cells do not
C
Sex cells have half the number of chromosomes, body cells have the same number
D
There is no difference.
13) What part of the punnett square represents the offspring?
A
The top and sides of the square
B
The bottom two boxes on the inside
C
The top two boxes on the inside.
D
All 4 boxes on the inside.
14) What are the base pairing rules of DNA?
A
C pairs with A, T pairs with G
B
A pairs with C, G pairs with T
C
A pairs with T, C pairs with G
15) Where is DNA stored?
A
In the cytoplasm of the cell.
B
In the cell membrane of the cell.
C
In the nucleus of the cell.
D
In the ribosome of the cell.
16) If a cell has 40 chromosomes, how many will it have after meiosis?
A
20
B
30
C
80
D
40
17) What are the advantages of asexual reproduction?
A
Have to find a mate, takes more time, produces less offspring
B
Takes less time, produces more offspring, don't have to find a mate
C
Don't have to find a mate, takes less time, produce less offspring
D
Takes more time, don't have to find a mate, produces more offspring
18) What is selective breeding?
A
Inserting a gene from one organism into another to obtain a desired trait.
B
The passing of traits from parents to offspring.
C
Breeding organisms to obtain a desired trait.
D
Reproduction that occurs from one parent.
19) What is an allele?
A
A section of DNA that is located on a chromosome.
B
The physical appearance of an organism.
C
Different forms of a gene.
D
The genetic makeup of an organism.
20) A homozygous tall plant is crossed with a short plant. Give all the possible phenotypes and genotypes of the offspring and t he probability of each occurring.
A
75% Tall, 25 % Short - 25% TT, 50% Tt, 25% tt
B
50% Tall, 50% Short - 50% TT, 50% tt
C
100% Short - 100% tt
D
100% Tall, 100% Tt
*select an answer for all questions
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