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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
Robert Hooke
C
Ms. Lightsey
D
Gregor Mendel
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
100% Green, 0% Yellow
B
75% Green, 25% Yellow
C
50% Green, 50% Yellow
D
0% Green, 100% Yellow
3) What is DNA made of?
A
Sugars
B
Nucleotides
C
Bases
D
Phosphates
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
Genetically identical offspring and less parental care
D
More parental care and genetically different offspring
5) Homozygous purple flowers and white flowers were crossed and resulted in all purple offspring. What does this tell us about purple flowers?
A
Purple flowers are dominant over white flowers
B
Purple flowers are recessive
C
White flowers are dominant over purple flowers
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
All are possibilities
B
BB x Bb
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
GGATCG
C
CGGACT
D
TCAGGC
8) What are similarities between asexual and sexual reproduction
A
Both have identical offspring
B
Both involve 1 parent
C
Both pass traits from parents to offspring
D
There are no similarities
9) What is heredity?
A
The study of how traits are passed from parents to offspring.
B
A type of reproduction involving 2 parents.
C
A type of reproduction involving 1 parent.
D
The passing of traits from parents to offspring.
10) What is a dominant allele?
A
The allele that masks or covers up the recessive allele. It always shows up if it is present.
B
The same allele on different genes.
C
The genetic combination of an organism.
D
The allele that gets masked or covered up.
11) What is the shape of DNA called?
A
Trapezoid
B
Twisted Ladder
C
Double Helix
D
Spiral
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 have half the number of chromosomes, body cells have the same number
C
Sex cells create identical cells, body cells do not
D
There is no difference.
13) What part of the punnett square represents the offspring?
A
The bottom two boxes on the inside
B
The top two boxes on the inside.
C
The top and sides of the square
D
All 4 boxes on the inside.
14) What are the base pairing rules of DNA?
A
A pairs with T, C pairs with G
B
C pairs with A, T pairs with G
C
A pairs with C, G pairs with T
15) Where is DNA stored?
A
In the cell membrane of the cell.
B
In the cytoplasm 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
30
B
80
C
40
D
20
17) What are the advantages of asexual reproduction?
A
Takes less time, produces more offspring, don't have to find a mate
B
Takes more time, don't have to find a mate, produces more offspring
C
Don't have to find a mate, takes less time, produce less offspring
D
Have to find a mate, takes more time, produces less offspring
18) What is selective breeding?
A
The passing of traits from parents to offspring.
B
Breeding organisms to obtain a desired trait.
C
Reproduction that occurs from one parent.
D
Inserting a gene from one organism into another to obtain a desired trait.
19) What is an allele?
A
The physical appearance of an organism.
B
A section of DNA that is located on a chromosome.
C
The genetic makeup of an organism.
D
Different forms of a gene.
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
100% Short - 100% tt
B
50% Tall, 50% Short - 50% TT, 50% tt
C
75% Tall, 25 % Short - 25% TT, 50% Tt, 25% tt
D
100% Tall, 100% Tt
*select an answer for all questions
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