A) no. the man can’t be a carrier
b) his father
c) no. the colorblindness has to show up on both X and Y chromosomes to be colorblind. So if the mother is not colorblind nor a carrier, then most likely it won’t happen since it’s a recessive gene.
Answer:
the United States, Canada and Greenlang
Answer:
Fossil steroid and molecular clock evidence suggests that animals originated between 770 and 710 million years ago
Explanation:
Receptors detect changes in the environment. For a stimulus to elicit a response, certain cells must have an appropriate receptor. Stimulation of the receptor initiates a specific signal pathway.
