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DNA, Genetics And Evolution (5)
Test Description: DNA, Genetics and Evolution -Middle School - Life Science
Instructions: Answer all questions to get your test result.
1) DNA is sometimes referred to as a ladder. Which two molecules make up the sides of the DNA ladder? (sugar usually ends in ose)
A
phosphate and nitrogen base
B
phosphate and deoxyribose
C
phosphate and ribose
D
nitrogen base and ribose
2) What is NOT an example of DNA technology currently used in agriculture?
A
The development of pesticide resistant crop plants
B
The use of growth hormones produced from recombinant bacteria to increase milk production
C
The development of frost resistant crop plants
D
The cloning of human nerve cells from corn plants
3) How many chromosomes are normally found in a human sex cell?
A
2000
B
48
C
46
D
23
4) In Deoxyribonucleic acid, Adenine pairs with the nitrogen base -
A
cytosine
B
adenine
C
guanine
D
thymine
5) Which would NOT represent an inherited trait?
A
Curly hair
B
Dimples
C
Popping your knuckles
D
Blue eyes
6) What is an organism called that has two different genes for a trait? (examples: Tt or Rr)
A
A hybrid or heterozygous
B
A mutation
C
An endangered species
D
A purebred or homozygous
7) Scientists have genetically engineered certain crops to be resistant to the harmful effects of pesticides. What is one advantage of this modification?
A
The crops could have slower growing rates because of their modified genes.
B
The farmer will produce crops that could be potentially harmful to human consumption.
C
The farmer will not kill his crops when defending them against a pest.
D
The crops could potentially pass this modification onto the pest, which would allow the pest to eat the crops.
8) What is NOT a principle of genetics?
A
Traits are passed from parents to offspring.
B
Genes are usually dominant or recessive.
C
Recessive traits always show up in the offspring.
D
Traits are determined by gene pairs.
9) What do we call the trait that hides or masks another trait?
A
Incomplete dominance
B
A dominant trait
C
DNA replication
D
A recessive trait
10) If the tall trait is dominant over the short trait, which would be used to represent the dominant trait?
A
t
B
S
C
T
D
s
*select an answer for all questions
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