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DNA, Genetics And Evolution (4)
Test Description: DNA, Genetics and Evolution -Middle School - Life Science
Instructions: Answer all questions to get your test result.
1) What traits could represent the phenotype of an organism?
A
wrinkled, ww
B
yellow, tall
C
Tt, purple
D
Rr, RR
2) If free ear lobes (L) are dominant over attached ear lobes (l), what is the phenotype of an individual with a genotype of ll?
A
Free ear lobes
B
LL
C
Attached ear lobes
D
One attached and one free ear lobe
3) The small segments of a chromosome that helps code for a trait are called
A
genes
B
proteins
C
genotypes
D
nucleotides
4) In rabbits, black fur (B) is dominant over white fur (b). If a hybrid black rabbit mated with a purebred white rabbit, what percentage of the offspring will have black fur?
A
50%
B
0%
C
100%
D
25%
5) In a genotype, what does the lower case letter represent?
A
Incomplete dominance
B
The recessive trait
C
The dominant trait
D
Multiple dominance
6) Of the choices listed below, where is genetic engineering most often applied?
A
Medicine and agriculture
B
solar panels and electricity
C
dish detergent and shampoo
D
dentistry and computers
7) 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, what percent of the 4 children will express widow's peak?
A
0%
B
75%
C
25%
D
100%
8) What forms the chemical code within a molecule of DNA?
A
The arrangement of the nitrogenous bases
B
The arrangement of the chromosomes
C
The arrangement of the sugars and bases
D
The arrangement of the phosphates and sugars
9) 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?
A
DNA replicating
B
Trait extraction
C
Genetic engineering
D
Chromosome mutation
10) Which sex chromosome combination is for a female?
A
XX
B
YY
C
XY
D
XYY
*select an answer for all questions
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