A man has red-green color blindness. His wife is not color-blind, nor is she a carrier. They give birth to a baby boy. Their doctor says there is zero possibility that the son has red-green color blindness. Which of the following is a possible explanation of the doctor's statement?

Red-green color blindness is a dominant autosomal trait.
Red-green color blindness is a Y-linked trait.
Red-green color blindness is an X-linked trait.
Red-green color blindness is carried by mitochondrial DNA.

Red-green color blindness is an X-linked trait.  

Explanation:

A red-green color blindness is a hereditary disease which occurs with inheritance of recessive X linked chromosomes, which depicts that the gene or allele causing this defect is presents on the X chromosome.

Since males can express the recessive gene with one copy of the X chromosomes, this defect is more common among men than women.

So even if a grandfather has this defect, this may get inherited by his grandson, while his mother might just be a carrier.

This is the reason why the baby boy inherited the red-green blindness from his father.

answer: after carbon dioxide enters the leaf through stomata it moves into the mesophyll cells where photosynthesis occurs and glucose is constructed. respiration occurs when glucose (sugar produced during photosynthesis) combines with oxygen to produce useable cellular energy.

explanation:

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).