The two sides of the DNA helix are held together by

By hydrogen bonds

Explanation:

The two "steps" are made from base pairs formed between the nitrogenous bases. The DNA double helix is held together by Hydrogen bonds between the bases attached to the two strans

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

on the planet jupiter, the acceleration due to gravity is approximately 26 m s2 , roughly 2.7 times the acceleration due