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Science Assessment
DNA
Instructions
Please complete this assessment on your own. Answer each item by clicking on the correct
choice, then go on to the next item.
1) Which scientist performed experiments to study the genes of pea plants?
A) Newton
B) Watson
C) Mendel
D) Galileo
2) Genes have different versions. Which term is the name of a gene's version?
A) genotype
B) phenotype
C) phenocopy
D) allele
3) What shape is a DNA molecule?
A) a straight ladder
B) a curled ladder
C) a twisted ladder
D) a ladder broken down the middle
4) Which of the following characteristics of living things is necessary for a species to
continue?
A) homeostasis
B) development
C) reproduction
D) energy use
5) Each arm of a replicated chromosome contains ___________________.
A) many DNA molecules
B) a few DNA molecules
C) one DNA molecule
D) no DNA molecules
6) Individual genes store bits of information that make cells function. Identify which of the
following describes a gene.
A) a segment of DNA
B) a segment of RNA
C) a segment of protein
D) a segment of carbohydrate
7) Genetic information is stored in________________.
A) DNA molecules
B) RNA molecules
C) protein molecules
D) carbohydrate molecules
8) Chromosomes consist of what material?
A) DNA only
B) protein only
C) DNA and protein
D) neither DNA nor protein
9) Characteristics such as eye color, that are passed from one generation to the next, are
known as:
A) alleles
B) chromosomes
C) traits
D) gametes
10) The passing of traits from parent to offspring is called ___________________.
A) reproduction
B) diversity
C) heredity
D) chromosome
11) What are the possible genotypes of the offspring represented in this Punnett square?
A) AA and aa
B) AA and Aa
C) Aa and Aa
D) Aa and aa
12) What is the result of the information in a gene?
A) genotypes
B) phenotypes
C) phenocopies
D) alleles
13) A black guinea pig crossed with a white guinea pig resulted in black offspring. What type
of trait is black fur?
A) dominant
B) codominant
C) recessive
D) sex-linked
14) Which of the terms correctly describes an individual with two different alleles for a trait?
A) homologus
B) heterologus
C) homozygous
D) heterozygous
15) Which term correctly describes an individual with a pair of the same alleles for a trait?
A) homologus
B) heterologus
C) homozygous
D) heterozygous
16) Identify the theory that Gregor Mendel was attempting to prove.
A) genes
B) chromosomes
C) heredity
D) reproduction