Genetics Vocabulary: Dominant and Recessive
Explore the fundamental concepts of dominant and recessive alleles, genotypes, and phenotypes with this Grade 7 science worksheet.
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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. Use your knowledge of genetics vocabulary to complete the tasks.
1. A allele is a trait that will always be expressed if present.
2. A allele is a trait that is only expressed when two copies are present.
3. The observable characteristics of an organism are called its .
4. The genetic makeup of an organism is called its .
5. Different forms of a gene are called .
1. Which of the following represents a homozygous dominant genotype?
Aa
AA
aa
None of the above
2. If an organism has one dominant allele and one recessive allele for a trait, what will be its phenotype?
Recessive trait
Dominant trait
A blend of both traits
Neither trait
1. A genotype of 'gg' would result in the expression of the dominant trait.
True
False
2. If an organism has a heterozygous genotype, its phenotype will always show the dominant trait.
True
False
1. Explain the difference between a dominant allele and a recessive allele. Provide an example for each.
2. Describe the relationship between genotype and phenotype.
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