Genetics Vocabulary: Dominant and Recessive
Explore key genetics vocabulary including dominant and recessive alleles, genotypes, and phenotypes with this Grade 11 science worksheet.
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Genetics Vocabulary: Dominant and Recessive
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Read each question carefully and provide your best answer. This worksheet will test your understanding of key genetics vocabulary.
Use the words below to complete the sentences.
1. A specific version of a gene is called an .
2. An organism's observable characteristics are its .
3. An allele that masks the expression of another allele is considered .
4. The genetic makeup of an organism, represented by letters, is its .
5. An individual with two identical alleles for a particular gene is .
6. An allele that is only expressed when two copies are present is .
7. Which of the following describes an organism with two different alleles for a trait?
Homozygous dominant
Homozygous recessive
Heterozygous
Purebred
8. If 'B' represents the dominant allele for brown eyes and 'b' represents the recessive allele for blue eyes, what is the phenotype of an individual with the genotype 'Bb'?
Blue eyes
Brown eyes
Green eyes
Hazel eyes
9. A recessive allele will always be expressed in the phenotype.
True
False
10. An organism's genotype directly determines its phenotype.
True
False
11. Explain the difference between a dominant allele and a recessive allele. Provide an example.
12. Describe the relationship between genes, alleles, genotypes, and phenotypes.
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