In pea plants Green is dominant to yellow. Two heterozygous green plants are crossed. What are the genotypes of the offspring?

When two heterozygous (Gg) individuals mate, the expected genotypes in offspring are GG, Gg and gg in proportion 1:2:1.

The Punnett square for this cross is:

          G               g

G     1/4 GG    1/4 Gg

g      1/4 Gg    1/4 gg

In conclusion, when two heterozygous (Gg) individuals mate, the expected genotypes in offspring are GG, Gg and gg in proportion 1:2:1.

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Explanation:

With two hetero-zygous are crossed,

Phenotypes are generally 75% of the dominant (Green) and 25% of the recessive (Yellow).

Genotypes would be

25% homo-zygous dominant (Green)

50% hetero-zygous  (Green)

25% homo-zygous (Yellow)

Note that the words homo-zygous and hetero-zygous do NOT spell with a hyphen.   filter does not allow for the correct spelling.

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