A couple with the ability to taste PTC have two grown sons and one grown daughter. The sons have the ability to taste PTC. Their daughter is a PTC non-taster. She married a PTC non-taster man, and they have two sons.

16. Construct a pedigree in the box below that fully represents the above scenario and tracks the inability to taste PTC (non-taster), which is caused by two recessive "t" alleles. In your pedigree, please make sure that:

-The correct shapes for males and females are used.

-The shapes that require shading are shaded.

-The genotypes are listed next to each pedigree shape.

Explanation:

A couple with the ability to taste PTC have two grown sons and one grown daughter.

The sons have the ability to taste PTC.

Their daughter is a PTC non-taster.

To produce a non taster with two recessive alleles, it means both parent has one copy each of the recessive allele t and the also possess the one copy of the dominant allele T to make them tasters ie they are heterozygote for the trait.

The square represents male and the circles represent females. The non-tasters are the affected and are shaded.

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.