Answers:
a. The Codons UAG, UGA and UAA on the mRNA sequence do not encode any amino acids because they are called nonsense or stop codons.
b. A nonsense codon causes end of polypeptide chain synthesis, when a ribosome reads the mRNA sequence UAG, UGA, or UAA during translation.
How about "recombinant DNA?" Which is the result of DNA cloning as ttom suggests.
The energy currency of the cells is ATP. This is used for example in photosynthesis where plant cells produce food and oxygen using carbon dioxide and glucose for the consumers. ATP is also used widely in all other cycles to produce different products.
Answer:
Parent 1 genotype: Dd
Parent 2 genotype: Dd
Child 1 (dimples): Dd or DD
Child 2 (no dimples): dd
Child 3 (no dimples): dd
Explanation:
No dimples (d) - recessive
D (dimples) masks d (no dimples), therefore D (dimples) is expressed