Practice Questions 1: Genetics
1. In one variety of corn, the kernels turn red when exposed to sunlight. In the absence of sunlight,
the kernels remain yellow. Based on this information, it can be concluded that the color of these
corn kernels is due to the
A. process of selective breeding
B. rate of photosynthesis
C. effect of environment on gene expression
D. composition of the soil
2. In some people, the lack of a particular enzyme causes a disease. Scientists are attempting to use
bacteria to produce this enzyme for the treatment of people with the disease. Which row in the
chart below best describes the sequence of steps the scientists would most likely follow?
Row
Step A
Step B
Step C
Step D
A.
identify the gene
insert the gene into
a bacterium
remove the gene
extract the enzyme
B.
insert the gene into
a bacterium
identify the gene
remove the gene
extract the enzyme
C.
identify the gene
remove the gene
insert the gene into
a bacterium
extract the enzyme
D.
remove the gene
extract the enzyme
identify the gene
insert the gene into
a bacterium
3. Base your answer to the question on the diagram below and on your knowledge of biology. The
diagram shows the results of a technique used to analyze DNA.
This technique used to analyze DNA directly results in
A. synthesizing large fragments of DNA
B. separating DNA fragments on the basis of size
C. producing genetically engineered DNA molecules
D. removing the larger DNA fragments from the samples
