42) When yellow-seeded and green-seeded pea plants are crossed, all the offspring are yellow-seeded. When the F1 yellow-seeded plants are crossed to green-seeded plants, what is the hypothesized genetic ratio

See the answer below

Explanation:

From the illustration, the yellow color trait is dominant over the green trait.

Assuming that yellow seededness is represented by the allele Y and green seededness by the alleles y. Y is dominant over y, hence a yellow seeded plant would be either YY or Yy while a green seeded plant would be yy.

For a cross between a yellow seeded plant and a green seeded plant to yield all yellow seeded offspring, it means that the parents are YY and yy.

         (yellow)YY    x   (green) yy

F1 progeny: All Yy (yellow)

Now, Yy is crossed with green-seeded plant, yy.

                Yy    x    yy

          Yy    Yy    yy    yy

Hypothesized Genotypic ratio

Yy = 1/2

yy = 1/2

Hypothesized Phenotypic ratio

Yellow seeded = 1/2

green seeded = 1/2

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

the answer is cell division : )