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DNA vs. Genes vs. Chromosomes
Definitions
1. DNA is a nucleic acid that contains the sequence for all our traits.
2. Genes are sections of DNA that code for a particular trait.
3. Chromosomes are condensed DNA fibers, each containing several genes
Comparisons
4. Write in order from smallest to largest: DNA, genes, chromosome
5. DNA makes up each gene, which are organized into chromosomes
6. Chromosomes are made of genes, which are made of DNA
Identify: Write DNA, Genes, or Chromosomes to show which each statement is describing. The
starred (**) will have more than one answer.
Chromosomes
7. Inherit one set from mom and one set from dad.
Genes, Chromosomes
8. Same in every person **
DNA, Genes, Chromosomes
9. Found in nucleus **
Genes
10. Codes for a trait
Chromosomes
11. Contains many genes
Genes
12. About 25,000 found in humans
Chromosomes
13. May be single-stranded or double-stranded
DNA
14. Sequence of nucleotides
Genes
15. Contain dominant or recessive alleles
Chromosomes
16. There are 46 in humans
Drawings: On the drawing below, write the sequence on the other strand of DNA. Then label DNA,
chromosome, and genes.
T
G G
C
C
A
C C
G G
Gene
A
T C
T A
G
T A
A G
G C
A T
T
Chromosome
** How many genes are shown in the drawing above? 3
G
C C
T G C
G
A C
C
G
DNA
Metaphors
1. Example: If a book represented a chromosome, each chapter would be a gene, and the words
would be DNA
2. In the space below, come up with your own metaphor to show the relationship between DNA,
genes, and chromosomes. Draw a picture in the space below. Underneath each picture, give
a brief description of how your picture represents the concept.
DESCRIPTION
PICTURE
DNA
Gene
Correct based on comments
made here. If I did not make
comments, leave it alone.
Chromosome