Amount of wear, and how long they are may contribute with age and maybe even coloration and pigment.
The father's father donates only the Y chromosome, not the X chromosome. The father's mother gives him his X chromosome.
Therefore, the father's father does not pass on any of the genetics of his X chromosome
Concentration gradient, size of the particle, and temperature are all factors
Answer:
Mutations are essential for evolution to occur because they increase genetic variation and the potential for individuals to differ. ... Beneficial mutations may become more common through natural selection. Harmful mutations may cause genetic disorders or cancer.
Explanation:
