Question

which statement is true about y chromosome analysis? it can be used to determine whether a person has a genetic disease caused by a mutant allele on an autosome. it is commonly used to determine the sex of an individual. it can be used to determine whether a man is carrying traits such as hemophilia and duchenne muscular dystrophy. it is commonly used to determine paternity and ancestry. it can be used to determine whether a man is likely to pass on traits such as hemophilia and duchenne muscular dystrophy.

Explanation:

• Y - chromosome analysis:
• Autosomal genetic diseases (mutant allele on an autosome) are not related to the Y - chromosome. So, the first option is incorrect.
• Sex determination is mainly based on the presence of X and Y chromosomes (XX - female, XY - male), but Y - chromosome analysis alone is not the common method for general sex determination (karyotyping with both X and Y consideration is more comprehensive). So, the second option is not the best.
• Hemophilia and Duchenne muscular dystrophy are X - linked recessive disorders. The Y - chromosome has no role in these traits. So, the third and fifth options are incorrect.
• Y - chromosome is passed from father to son. By analyzing the Y - chromosome markers (such as short tandem repeats), it can be used to determine paternity (if the Y - chromosome of the child matches the father's) and ancestry (tracking the Y - chromosome haplotypes through generations).

Answer:

It is commonly used to determine paternity and ancestry.