Answer:
DNA nucleotides:
DNA is present as genetic material in all organism except some virus. The nucleotide of DNA consists of the nitrogenous base. The bases of DNA are adenine, guanine, thymine and cytosine. The phosphate group and deoxyribose pentose sugar is present in the DNA nucleotides.
RNA nucleotides:
RNA is present as genetic material in some viruses only. The nucleotide of RNA consists of nitrogenous bases are adenine, guanine, cytosine and uracil. The phosphate group and oxyribose pentose sugar is present in the nucleotide of RNA.
Answer:
B. He has no E alleles.
Explanation:
In order for the boy to have an attached earlobes phenotype, he must have no E alleles, because the E is dominant. So his genotype must be ee. If he has even just a single E allele (like Ee) he will have detached earlobes, because the dominant trait will mask the expression of the recessive trait.
Why not A or D: Heterozygous Ee (one of each allele) would result in detached earlobes.
Why not C: If he has no recessive alleles, EE, he would have detached earlobes.
Dark is a state of no light and no energy. Dark affects nothing.
Answer:
Epistatic interaction of the two genes
Explanation:
In epistasis, the interaction between genes contradics one another, in essence, one gene masks the interference with the expression of another gene. As such any time two different genes contribute and have effects to a single phenotype and their effects are not merely additive, those genes are said to be epistatic.
