Genetics: Dominant and Recessive Traits
Explore key genetics vocabulary including dominant, recessive, genotype, and phenotype, and apply these concepts to inheritance patterns.
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Genetics: Dominant and Recessive Traits
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Read each question carefully and provide your best answer. This worksheet will test your understanding of dominant and recessive traits in genetics.
1. Which term describes an allele that always expresses its trait when present?
Recessive
Dominant
Homozygous
Heterozygous
2. For a recessive trait to be expressed, an individual must inherit:
One dominant allele
One recessive allele
Two dominant alleles
Two recessive alleles
3. The passing of traits from parents to offspring is called .
4. An organism's observable characteristics or traits are its .
5. The genetic makeup of an organism, consisting of the alleles it carries, is called its .
6. A heterozygous individual has two identical alleles for a particular gene.
True
False
7. Dominant alleles are always more common in a population than recessive alleles.
True
False
8. Explain the difference between a dominant allele and a recessive allele. Use an example to illustrate your explanation.
Use the words below to complete the sentences.
9. Different forms of a gene are called .
10. An individual with two different alleles for a trait is described as .
11. Observe the image below of a DNA double helix. DNA carries the genetic information that determines an organism's traits.
How do dominant and recessive alleles relate to the information stored in this structure?