1. What is the probability of the offspring having the dominant phenotype? a. 50% b. 0% c. 100% d. 33% The capital A's represent the dominant allele. Even when a recessive allele is present in the genotype, the dominant trait will be expressed in the phenotype due to its ability to mask the recessive allele. In the diagram there are only two boxes with capital A's in them, so there is a 50% chance of the dominant trait being expressed.
2. Eye color is a physical characteristic, what category does it fall under genotype or phenotype? a. genotype b. phenotype c. neither A phenotype is a physical trait. Since eye color is a physical characteristic it is a phenotype.
3. What is the correct pairing of the nitrogenous bases? a. A - C G - T b. A - U G - T c. G - A C - T d. A - U G - C All the other options are just incorrect. This is the correct base pairing for RNA molecules: adenine pairs with uracil and guanine pairs with cytosine. Refer to the key terms section for protein synthesis to see the base pairing rules. 4. Explain why a person can carry both a dominant and recessive allele, but express one of the genes. Which gene do they express? A person can carry both forms of the gene but the dominant gene is the one they express. The dominant gene masks the recessive trait in the phenotype.
5. How do tRNA know which amino acid to bring to the ribosome? tRNA know which protein to bring to the ribosome based on the condons in the mRNA strand. The codons code for specific amino acid and the tRNA anti- codons match the tRNA with the correct codon.