If you cross true breeding green and true breeding yellow pa

If you cross true breeding green and true breeding yellow parrots, you get all chartreuse birds. Show this Punnett squares, and the Punnett squares of crosses between chartreuse birds. List all ratios, percentages, and decimals.

Solution

GREEN -------ALLELE-COLOR ----G----------

YELLOW -----ALLELE-COLOR ----g ------

IF YOU CROSS TRUE BREEDING GREEN AND TRUE BREEDING YELLOW PARROTS

GG X gg

Genotype Gg-----------chartreuse bird---------F1 offspring

Genotype Gg----------- x Genotype Gg-

G

g

G

GG     green

Gg         chartreuse

g

Gg        chartreuse

gg            yellow

green

1/4

25%

chartreuse

2/4

50%

yellow

1/4

25%

Phenotypic ratio =1 (green):2 (chartrreuse):1 (yellow)

Genotype =1 GG (green):2 Gg (chartrreuse):1 gg(yellow

	G	g
G	GG     green	Gg         chartreuse
g	Gg        chartreuse	gg            yellow