Genetics Unit Test
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Question
In pea plants, the allele for round peas, R, is dominant over the allele for wrinkled peas, r. What is the phenotype of a pea plant with genotype Rr?(1 point)
Responses
round
round
slightly wrinkled
slightly wrinkled
some round and some wrinkled
some round and some wrinkled
wrinkled
round
What determines a trait of an organism?(1 point)
Responses
the number of copies of the gene
the number of copies of the gene
the number of dominant alleles
the number of dominant alleles
the combination of its alleles
the combination of its alleles
its phenotype
its phenotype
the combination of its alleles
To determine the phenotype of a pea plant with the genotype Rr, we need to understand the concept of dominance in genetics. In this case, the allele for round peas (R) is dominant over the allele for wrinkled peas (r).
To find the phenotype, we look at the dominant allele. Since the plant has one dominant allele (R) and one recessive allele (r), the plant will exhibit the characteristics of the dominant allele. Therefore, the phenotype of a pea plant with genotype Rr is round.
So, the correct answer is: round.