Arecessive gene for red-green color blindness is located on the x chromosome in humans. assume that a woman with normal vision (her father is color-blind) marries a color-blind male. what is the likelihood (give a percentage) that this couple's first son will be color-blind?

According to the rna world hypothesis, rna acted as the genetic material and catalyzed reactions in ancient cells. what conclusion can you draw from this?               a.  this implies that dna and proteins aren't essential in cells today.    b.  this implies that rna can catalyze any chemical reaction that enzymes catalyze.    c.  this implies that if a cell has a problem with its dna, its rna can compensate for the damaged dna.    d.  this implies that dna and proteins evolved after rna.