Answer:
chromosomes
Explanation:
Thread-like structures that are found in the nucleus of a cell that contains all DNA. Each chromosome is made of protein and a single molecule of DNA. Human cell nucleus contains 46 chromosomes or 23 pairs. Half of these chromosomes come from one parent and half come from the other parent.
the offspring has a 50% chance of having black feathers and a 50% chance of white feathers
Fluid, rolling, air resistance, and not sure about the last one.
The building blocks of proteins is Amino acids and nucleic acids is Nucleotides
