GOOD SCIENCE
Stage 5
Worksheet
10.2 Heredity
1. Draw a labelled diagram and describe the structure of a molecule of deoxyribonucleic acid
(DNA).
2. Match the terms with the correct definition below:
TERM
DEFINITION
A segment of DNA, the basic functional unit of heredity
Chromosome
The genetic code for a gene or an organism’s entire genome
Gene
How the genotype is physically expressed
Genome
Tightly coiled strand of DNA
Genotype
An organism’s entire set of DNA
Nucleotide
Building block of DNA (adenine, guanine, thymine, or cytosine
Phenotype
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3. Identify the number of chromosomes in the following human cells:
Cell Type
Number of Chromosomes
Somatic (body) cell
Sperm
Ova
Zygote
4. What percentage of genetic material does a parent pass to their offspring?
5. What percentage of genetic material do you share with your maternal grandmother
(mother’s mother)?
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