When the black coloured guinea pig (BB) is crossed with white coloured guinea pig (bb):
Parents: BB x bb
Gametes: B, B x b, b
F
1
generation: All Bb (black coloured guinea pig)
Selfing: Bb x Bb
Gametes: b, b x B, b
F
2
generation: BB, Bb, Bb and bb
The offsprings produced in the F
2
generation are:
BB- black coloured guinea pig
2 Bb- black coloured guinea pig
bb- white coloured guinea pig
The genotypic ratio is 1:2:1. (1 BB, 2Bb and 1 bb)
The phenotypic ratio is 3:1 (3 black and 1 white)
Nucleic acid, I’m pretty sure
When molecules move from one phase to another they are still the same substance. There is water vapor above a pot of boiling water. ... Even though the physical state changed, the chemical properties were the same. On the other hand, a chemical change would build or break the chemical bonds in the water (H2O) molecules.
Chromatin contains proteins called HISTONES. Histones<span> are highly </span>alkaline proteins found in eukaryotic cell nuclei that package and order the DNA<span> into structural units called </span>nucleosomes. <span>They are the chief protein components of </span>chromatin<span>, acting as spools around which DNA winds, and playing a role in </span>gene regulation<span>.</span>