Genetics Problem Solving Chapter 25

See the answer below

Explanation:

1.      Tt   x   Tt

   TT  Tt   Tt   tt

Assuming that T is dominant over t:

Genotype ratio = 1TT:2Tt:1tt

Phenotype ratio = 3:1

2.     Rr   x   Rr

    RR   Rr   Rr   rr

Assuming that R is dominant over r:

Genotype ratio = 1RR:2Rr:1rr

Phenotype ratio = 3:1

3.  Assuming that green (G) is dominant over the other color (g). Heterozygous green would be Gg

        Gg   x   Gg

     GG   Gg   Gg   gg

Genotype ratio = 1GG:2Gg:1gg

Phenotype ratio = 3:1 (green ratio the other color)

4. Assuming that green (G) is dominant over the other color (g) as above:

  homzygous green plant = GG; heterozygous green plant - Gg

      GG   x   Gg

   GG   Gg   GG   Gg

Genotype ratio = 1GG:1Gg

Phenotype ratio = 100% green

5. Assuming that tall (T) is dominant over short (t)

Homzygous tall plant = TT

short plant = tt

         TT   x   tt

       Tt   Tt   Tt   Tt

Genotype ratio = 100% Tt

Phenotype ratio = 100% tall

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.