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Name: ___________________________ Period: _____ Date: __________
Genetics Practice Problems
1.
4. If two green pod plants (Gg) are crossed what are the
expected phenotypes of the offspring and genotypes of the
offspring? Use the Punnett square to predict the % Phenotype and
Genotype of the offspring.
% Genotype
% Phenotype
Homozygous = _____
Green = _____
Heterozygous = ______
Yellow = _____
5. In humans, tongue rolling is a dominant trait; those with the
recessive condition cannot roll their tongues? If two people one
is a hybrid (Rr) to roll tongue and one is a pure recessive (rr)
to roll tongue what percent of the offspring could roll there
tongue?
% can roll tongue __________
6. In purple people eaters, one-horn is dominant (H) and no
horns are recessive (h). Use the Punnet Square showing the cross
of a purple people eater that is hybrid for horns (Hh) with a
purple people eater that does not have horns (hh). Summarize the
genotypes & phenotypes of the possible offspring
% Genotype
% Phenotype
Homozygous = _____
Horn = _____
Heterozygous = _____
No Horn = _____