In pea plants, the yellow seed allele (Y) is dominant over the green seed allele (y). What is the phenotypic ratio of yellow seeds to green seeds in the F2 generation resulting from a cross between two true-breeding parents, one with YY and one with yy?

3 yellow : 1 green

Explanation:

Yellow seed allele (Y) is dominant over the green seed allele (y).

A cross between two true breeding parents is done: YY x yy

The F1 offspring would be heterozygous Yy.

If the F1 is selfed (Yy x Yy) the expected ratios for the F2 generation according to Mendel's law of segregation would be:

1/4 YY (yellow)2/4 Yy (yellow)1/4 yy (green)

So 3/4 seeds of the F2 would be yellow because they have a dominant Y allele, and 1/4 would be green.

The phenotypic ratio will be 3 yellow : 1 green

Ithink all of these events

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans,  squash,  amaranth, and chile peppers.