Cystic fibrosis is a recessive gene disorder. The pedigree chart for a family known to have cystic fibrosis is shown. What percentage of the offspring have observable disease?
0 0%
O 25%
Thing
O 50%
75%

What causes temperature extremes in the desert

What are the three types of counseling established by marine corps policy?

1. fold your hands together so your thumbs cross over ,and look at your thumbs. which thumb feels most "comfortable" on top is actually controlled by a gene. the left thumb folding over the right thumb is a domi