Yes the hypothesis of the sea-floor spreads through the ocean ageing
The answer is true. During translation of mRNA, the nucleotides are read by the translation unit (ribosome and trna) in sequences of three (3). These sequences are referred to as codons. Codons code for amino acids. Some codons are start of stop codons meaning they initiate or terminate translation. Additionally, more that one codon could code for one amino acid.
The offspring did not have white fur due to the fact that white fur is a recessive trait. One parent had brown fur, which is a dominant trait, that cancels out the recessive trait and that is why the offspring did not have white fur.
DNA and RNA are both found in the nucleus of a cell. RNA is moved out of the nucleus through pores. Hope this helped.