Unformatted text preview: plain the fruit fly patterns now?
There are a few genes that are on the Y chromosome that are male speciﬁc traits, however
there are not many (especially in comparison to the X chromosome genes).
Females carry two copies of the gene and males only carry one. How To Quickly Spot An X-Linked Trait
2. Recessive phenotypes show up more often in males.
A son cannot inherit sex-linked gene from his father. Practice Problem
Hemophilia is caused by a recessive, X-linked allele. Prince
Leopold (Son of Queen Victoria) had hemophilia. His wife
did not carry the allele. They had one son and one daughter.
What is the probability his son was also a hemophiliac?
There is no chance of the son having hemophilia- the only allele he receives is from his
mother and she does not even carry the trait for being a hemophiliac. The daughters will
be carriers so therefore 50% of their offspring have...
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This note was uploaded on 02/24/2014 for the course BIOL 180 taught by Professor Freeman during the Winter '07 term at University of Washington.
- Winter '07