Galactosemia is a recessive human disease that is treatable by diet. susan smithers and her husband are both heterozygous for the galactosemia gene. if the couple has four children, what is probability that at least one of the children will have galactosemia?

The galactosemia is a condition, in which the affected person is not able to metabolize the galactose sugar. This is a genetic disorder, inherited as an autosomal recessive trait.  

In this case, Susan and her husband both are heterozygote for the condition, which means they have one dominant and one recessive allele. So, the genotype of both the individuals are Gg and Gg (let’s say G codes for dominant allele and g is recessive allele).  

The attached image represents the cross between two heterozygous individual.

The given cross shows 1 out of 4 children would be affected with galactosemia, so, there is 25% or 0.25 probability that one of the children would be affected.  

hammurabi rulers

good lesson

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.