posted by Steve .
A woman with a genetic disease marries a man who does not carry them disease. It is not possible for their children to carry the disease. The disease must be --
d) caused by an extra chromosome
my answer is b recessive
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you.
I answered this before. Carriers have the recessive gene in their genotype, but do not show the trait in their phenotype. Dominant leads to both expressed in genotype and phenotype, so they are not just carriers, but have the trait, C.