The "a" recessive allele will not be expressed in her phenotype. Queen Victoria of England was a carrier of the gene for hemophilia. Archived from the original on 21 November
However, this is not technically correct. Because the Y chromosome only experiences recombination with the X chromosome at the ends as a result of crossing-overthe Y chromosome essentially is reproduced via cloning from one generation to the next. Archived from the original on 29 September
This seems to be a sizeable chunk, yet we seem to be distant relations. Some genetic disorders are now known to result from mutations in imprinted genes. Consequently, transmission to offspring and the risk of developing the disease in males having one X chromosome and females two X chromosomes are not the same.
In humans, the term generally refers to traits that are influenced by genes on the X chromosome.
Men normally have an X and a Y combination of sex chromosomes, while women have two X's. Carla Easter, Ph. In this context, sex chromosomes made perfect sense — a matching pair to go with the hormones that determine maleness and femaleness. All of them were men, as expected. X-linked recessive genetic defects - how girls are affected.