Answer: <u>D.  Thymine is used in replication while uracil is used in transcription.</u>
Explanation:
Genetic information is stored in double-helixes of DNA molecules (Doxyribonuclease). In replication, two daughter strands of DNA are copied from the parent strand, while in replication, instructions stored within DNA are copied into a different form, called mRNA  or messenger RNA. 
Nucleotides are monomers comprising DNA, a nucleic acid that along with RNA, a ribose sugar-containing nucleotide, acts as a storage molecule to encode proteins. 5-carbon deoxyribose or ribose sugar, phosphate and one of four nitrogen bases are found in nucleotides:
Adenine (A)
Guanine (G)
Cytosine (C)
Thymine (T).  
Uracil (U) found in RNA
While <em>both contain four nucleotide bases, </em> in RNA, uracil replaces thymine... The DNA nucleotides are involved in replication while RNA nucleotides drive transcription, 
 
        
             
        
        
        
The answer is A The amino acid inactivates the repressor
        
             
        
        
        
the Pacific, Atlantic, Indian, Southern, and Arctic.
I hope this helps please mark me as brainliest;)
 
        
             
        
        
        
Answer:
Alleles for feather colour exhibit incomplete dominance or co-dominance.
50% gray offspring + 50% black offspring
Explanation:
<em>It means that the alleles for feather colour in the hen exhibit incomplete dominance or co-dominance over one another.</em>
Assuming the allele for white colour is B, white colour will be b while the heterozygote Bb gives the gray phenotype.
Gray rooster + gray hen = 15 gray chicks, 6 black chicks and 8 white chicks.
15:6:8 is roughly 2:1:1 which is phenotypic ratio obtainable from crossing two heterozygous individuals as pointed out by Mendel.
Bb   x   Bb = 1BB, 2Bb, and 1bb
Crossing the gray rooster (Bb) with a black hen (bb):
Bb   x   bb = Bb, Bb, bb, and bb
           = 2Bb (gray):2bb (black)
50% of the offspring will be gray while the remaining 50% will be black.
 
        
             
        
        
        
Answer:it’s A)
Explanation:I saw it on a quiezlet online lol