If you had two pure breeding plants, one possessing a homozygous dominant allele for seed color...
If you had two pure breeding plants, one possessing a homozygous dominant allele for seed color (Yellow YY) and another with a homozygous recessive alleles for seed color (Green yy), and you crossed them, what would your resulting hybrid phenotype be?
not enough information to determine the color
green only
yellow only
yellow and green
Homework Answers
F1 Hybrid produce seed colour is yellow.
Homozygous dominant allele for seed colour - YY, which represent the seed colour yellow. The plant is homozygous so it produce same type of gametes "Y", which represent the seed colour yellow.
Homozygous recessive allele for seed colour - yy which represent the seed colour green. Which produce same type of gametes "y", which represent the seed colour green.
The F1 hybrid is yellow colour, because yellow is dominant so that suppress the expression of recessive allele( in the presence of the dominant allele expression of the recessive allele is supressed) as a result seed colour is yellow in hybrid.
F2 generation:-
| Gametes | Y | y |
| Y | YY(yellow) | Yy(yellow) |
| y | Yy(yellow) | yy(green) |
F2 phenotypic ratio is 3:1(yellow : green)
F2 hybrid produce both yellow and green seed colour.
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