Glucose-6-phosphate dehydrogenase (g6pd) deficiency is inherited as an x-linked recessive gene in humans. a woman whose father suffered from g6pd marries a normal man. what proportion of their sons is expected to have g6pd? enter your answer as a fraction.

1/2

Explanation:

Let us assume that the presence of "g" allele on the X chromosome causes the disease. An X linked recessive disease is passed from an affected male to his daughters. A female with one copy of "g" allele on her X chromosome would serve as carrier for the disease while the female with two copies of "g" alleles would be affected with the disease.  

A male with one copy of the "g" allele on his X chromosome would be affected with the disease. This is due to the fact that human males are hemizygous for X linked genes.  

Given that the female had the affected father, the genotype of the female would be "X^gX". The genotype of the normal man would be "XY". A cross between carrier female and normal male would give 1/2 affected sons.  

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.