1. Use a Punnett square to cross 2x heterozygous tall pea plants, where T=tall and t=short.
Phenotypic ratio:
Genotypic ratio:
2. Cross a tall homozygous pea plant with a heterozygous pea plant, where T=tall and
t=short.
Phenotypic ratio:
Genotypic ratio:
3. In a case of incomplete dominance, cross a black lab with a chocolate lab, where B=black
and b= yellow.
Phenotypic ratio:
Genotypic ratio:
4. In a case of incomplete dominance, cross a black lab with a yellow lab, where B=black
and b= yellow.
Phenotypic ratio:
Genotypic ratio:
5. In a case of incomplete dominance, cross 2 gray lab mice, where
B=Black and b=white.
Phenotypic ratio:
Genotypic ratio:
6. In a case of Co-dominance, cross a black cow with a white cow, where B=black
and b=white.
Phenotypic ratio:
Genotypic ratio:
In a case of Co-dominance, cross a black cow with a spotted cow, where
B=black and b=white.
Phenotypic ratio:
Genotypic ratio:
Matching
Medals cross: Expected phenotypic ratio
Parental cross
9:3:3:1
F1 Cross
3:1
Dihybrid cross
4:0