Genetics Vocabulary: Genotype and Phenotype
Explore key genetics vocabulary including genotype, phenotype, homozygous, and heterozygous with this Grade 7 science worksheet.
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Genetics Vocabulary: Genotype and Phenotype
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Read each question carefully and answer to the best of your ability. This worksheet will test your understanding of basic genetics vocabulary.
1. The observable physical traits of an organism are called its .
2. The genetic makeup of an organism, consisting of the alleles it carries, is its .
3. An organism that has two identical alleles for a particular trait is said to be for that trait.
4. An organism that has two different alleles for a particular trait is said to be for that trait.
5. The passing of traits from parents to offspring is called .
6. Which of the following best describes a genotype?
The color of a flower
The genetic code for a trait
The height of a plant
The type of soil a plant grows in
7. If an organism has the alleles 'Tt' for a trait, it is considered:
Homozygous recessive
Homozygous dominant
Heterozygous
Phenotypic
8. A phenotype can be influenced by environmental factors.
True
False
9. All homozygous organisms will express the dominant phenotype.
True
False
10. Explain the difference between genotype and phenotype using an example.
11. Describe what is meant by 'heterozygous' and 'homozygous'.
12. The image to the left shows a DNA double helix. In your own words, explain how DNA relates to genotype and phenotype.
Use the words below to complete the sentences.
13. Different forms of a gene are called .
14. A allele will always be expressed if present.
15. A allele will only be expressed if two copies are present.
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