When mendel crossed yellow- seeded and green- seeded pea plants, all the offspring were yellow seeded. when he took these f1 yellow- seeded plants and crossed them to green- seeded plants, what genotypic ratio was expected

genotypic ratio = 2:2

Explanation:

We were being told that when Mendel crossed yellow- seeded and green- seeded pea plants, all the offspring were yellow seeded.

This implies that the Yellow seed trait masked the green seed trait in the F1 generation. The best defination that can be deduced is that;

the yellow-seeded plants are homozygous dominant &

the green-seed pea plants are homozygous recessive

So, let yellow- seeded pea plants= YY

and green- seeded pea plants= gg

i.e YY × gg

  | Y | Y

g | Yg | Yg  

g | Yg | Yg

F₁ = (Yg, Yg, Yg, Yg,) All the offspring were heterozygous yellow seeded plant.

Now, when he crossed the F₁ heterozygous yellow seeded plant with the green- seeded plants; we will have the following result

i.e Yg × gg

  | Y | g

g | Yg | gg  

g | Yg | gg

F₂ = (Yg, Yg, gg, gg)

The F₂  generation would have genotypes of (Yg, and gg) and a genotypic ratio of 2:2

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

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.