There are 4 bases:
Adenine,
Thymine,
Guanine,
Cytosine.
Answer: "Decreasing the salt concentration of the solution lowers DNA's melting point (Tm)" is not a true statement
Explanation:
Increasing salt concentration would lower the DNA's melting point (Tm), not otherwise.
For instance:
- In 8M urea (8M means 8 Moles per dm3), Tm is decreased by nearly 20°C.
- 95% formamide at room temperature would completely denature the double stranded DNA.
Thus, higher concentration of salts like urea or formamide lowers Tm, not otherwise
Abiogenesis is another name for spontaneous generation.
In meiosis one, homologous chromosomes only separate resulting in two cells. In meiosis II, the cells divide further, separating sister chromatids and resulting in four cells. So the cells are just even smaller with less chromosomes in each one.
I n the F1 generation, there will be no recessive offspring but in the F2 generation there is a 25% of offspring being recessive.
You can find more info about percentages by observing images. called Punnett Squares.
Hope it helped,
BioTeacher101
