Directions: Consider a pedigree that is tracking an autosomal recessive trait, where two recessive alleles (tt) result

in the inability to taste a chemical known as PTC. The ability to taste PTC is determined by the presence of a

dominant allele (T). Complete the missing boxes in the chart. The first row has been done for you as an example!

*Note: The ability to taste PTC may be more complex than a simple gene trait.

Individual Phenotype

PTC taster

Shape (in Pedigree)

Square

Shaded?

No

1.

2.

3.

4.

6.

Male with genotype TT

Male with genotype Tt

Male with genotype tt

Female with genotype TT

Female with genotype Tt

Female with genotype tt

7.

10.

13

11.

14.

12.

15.

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.

ya the other dude is right