Answer:
One band of light density and one band of heavy density.
Explanation:
According to conservative model of replication, the original strands do not separate from each other during replication. Hence, after replication the old strands are together and the new strands are together.
Here, cells were grown in 14N medium first so 14N was used for DNA replication and all DNA molecules had 14N. When the cells were transferred to 15N medium, only 15N was available for replication process. New DNA molecules would be synthesised using 15N (15N15N) and old DNA molecules have 14N (14N14N). Hence, in density gradient one band will be of light density (14N14N) and one band will be of heavy density (15N15N).
D from the sea to the land
Answer:
Law of Dominance
Explanation:
The dominant trait dominates or prevents the expression of the recessive trait. Dominant trait and recessive trait are represented by a capital and a small letter respectively. A dominant trait like round is seed, for example is represented by letter R and a recessive trait like wrinkled seed is represented by small letter r.
