Genetics Vocabulary: Dominant and Recessive
Explore key genetics vocabulary including dominant, recessive, genotype, phenotype, homozygous, and heterozygous alleles.
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Genetics Vocabulary: Dominant and Recessive
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Read each question carefully and provide the best answer based on your knowledge of genetics vocabulary.
1. An allele that is always expressed when present is called a allele.
2. An allele that is only expressed when two copies are present is called a allele.
3. The genetic makeup of an organism, represented by letters, is its .
4. The observable physical traits of an organism are its .
5. An individual with two identical alleles for a trait is .
6. If 'T' represents the dominant allele for tallness and 't' represents the recessive allele for shortness, which genotype would result in a tall phenotype?
tt
Tt
Both Tt and TT
Only TT
7. An individual with the genotype 'Aa' for a given trait is considered:
Homozygous dominant
Homozygous recessive
Heterozygous
Purebred
8. A recessive allele will always be expressed in the phenotype, regardless of the other allele present.
True
False
9. If an organism has a genotype of 'BB', it is homozygous dominant.
True
False
10. Distinguish between genotype and phenotype using an example of a flower's color where red (R) is dominant over white (r).
11. Observe the image below of a DNA double helix. Explain how alleles, which determine traits, are represented within this structure.
