Help with Biology please!?

Question

A green - leafed plant is crossed with a plant with yellow leaves. This produces 185 green - leafed plants. Summarize the genotypes and phenotypes of the offspring produced by crossing two green leafed plants obtained from the initial parent plants. Answer soon plz!!!!!!!!! Thank you!

Another Question:
crossing wrinkle-seeded plants with
pure round-seeded plants produced only round-seeded plants. What genotypic and phenotypic ratios can be expected from a cross of a wrinkle -seeded plant and a plant heterozygous for this trait (seed appearance) please answer soon thanks!

Answer 1

GG x gg

Gg Gg Gg Gg

Gg x Gg

GG Gg gG gg

G: green leaf plant
g: yellow leaf plant

The offspring phenotypes will be 75% green, and 25% yellow.
Their genotypes are as follows:
GG: green
Gg: green
gG: green
gg: yellow

Answer 2

This is a classic monohybrid cross.

If green x yellow yields all green offspring, then green is dominant and yellow is recessive.

G - green
g - yellow

Parents GG x gg
F1 all Gg

to get F2, cross Gg x Gg in the usual way, forming the gametes and placing them on the top and sides of the Punnett square. The answer boxes in the Punnett square will contain GG, Gg, gG, gg. These are the expected genotypes of the F2. (Genotype means what alleles the plants have.) The expected phenotypes (form of the trait that is seen) will be 3 green: 1 yellow.

Answer 3

Wow! You can't get any more basic than this. I suggest extra study time and asking for help in understanding the theory.

If G = green leaves and g = yellow leaves, the parents are most probably GG and gg. G is dominant over g. The offspring are Gg (heterozygous). In theory, the green parent could be heterozygous too but the odds are against it. If the green parent were heterozygous, you would expect one in four of the offspring to be yellow.

Now, figure out what would happen if you crossed two of the offspring (Gg x Gg).

Oh yes, I forgot to mention that your teacher is assuming that the plants are genetically disposed to have green or yellow leaves. If the yellow-leaved plant were deficient in nitrogen, it could have yellow leaves even though it was GG or Gg and would not pass that characteristic along when it breeds. Now, have I confused you sufficiently?

Answer 4

Genotype= 25% pure dominant
50% Hybrid
25% pure recessive

Phenotype= all but 25% would be Green the 25 would be yellow.