Genetics Vocabulary: Dominant and Recessive
Explore key genetics vocabulary including dominant and recessive alleles, genotypes, and phenotypes through various question formats.
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Genetics Vocabulary: Dominant and Recessive
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Read each question carefully and answer to the best of your ability. This worksheet covers key vocabulary related to dominant and recessive traits in genetics.
1. Which term describes an allele that is always expressed when present?
Recessive
Dominant
Homozygous
Heterozygous
2. An organism's observable characteristics are known as its:
Genotype
Allele
Phenotype
Chromosome
3. A allele is only expressed when two copies are present.
4. The genetic makeup of an organism, consisting of the alleles it carries, is called its .
5. If an organism has two identical alleles for a particular trait, it is said to be for that trait.
6. A dominant allele will always mask the expression of a recessive allele when both are present.
True
False
7. A heterozygous individual has two different alleles for a specific gene.
True
False
8. Explain the difference between genotype and phenotype using an example.
9. Describe what is meant by a 'carrier' in the context of recessive genetic disorders.
Use the words below to complete the sentences.
10. A specific version of a is called an .
11. If a trait is , it will only be expressed if the organism inherits two copies of that allele.
12. The trait that masks another trait is referred to as .
Examine the image of the DNA double helix below.
13. How does the structure of DNA relate to the concept of alleles and genes?