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If a father and son are both defective i...

If a father and son are both defective in red-greenn colour vision, is it likely that the son inherited the trait from his father? Comment.

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### Step-by-Step Solution: 1. **Understanding the Trait**: Red-green color blindness is an X-linked recessive trait. This means that the gene responsible for this condition is located on the X chromosome. 2. **Chromosome Composition**: Males have one X and one Y chromosome (XY), while females have two X chromosomes (XX). Since males inherit their Y chromosome from their father and their X chromosome from their mother, the X chromosome that a son receives comes solely from his mother. 3. **Inheritance of the Trait**: If both the father and son are color blind, it is important to note that the son cannot inherit the X-linked trait directly from his father. The son receives his X chromosome from his mother, not from his father. ...
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