BI-355
Genes and alleles
Biology · Secondary 3 · Easy · Genes and alleles
Tongue rolling in humans is controlled by one gene with two forms, R and r. A person has genotype Rr. Which description is correct?
- R and r are two alleles of the same gene.
- Rr is a single allele that controls tongue rolling.
- R and r are two different genes on different chromosomes.
- Rr is the gene and R and r are two chromosomes.
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